2026/07/16
The problem with utilitarianism
2026/01/27
Feynman Diagrams of Currencies
Feynman diagrams are a way of understanding state interactions and changes in subatomic particles. In this post, I use simple diagrams to understate state interactions between different types of money. The title of is inspired by Michael Crichton's explanation of how he coined the phrase "Gell-Mann Amnesia" as I wrote about before: Name dropping a famous physicist bestows gravitas. So now that I have your attention (if not respect), let's draw some diagrams.
Current era
Gold Standard: pre-1930s
Post-Bretton Woods
- Solid lines represents easily exchangeable value.
- Dashed lines represents flows with barriers e.g. currency controls.
- The direction of the arrows represents where value "wants" to flow
- Inflation: people prefer strong money to weak money. Strong in the basic sense of future purchasing power for real goods and services. Of course all else is not equal, so sometimes a weaker currency is required as a means of exchange.
- Permission: all else being equal, people prefer money that they can use without permission. Of course all else is not equal, for example physical cash is great for permissionlessness. But it's not the best for long distance exchange or storage.
Hard/soft and strong/weak currencies
Stablecoins
Stablecoins and CBDCs
USD Stablecoins demand
Stablecoins as USD turbo-supply
- the US government will never do a hard default where it simply refuses to pay back that $1 of debt. Why? Because it can always do a soft default: print another $1 out of thin air and pay the debt with it. It is fiat money, remember? Of course you can only do this if the debt is denominated in the currency that you print, so this is more true of the dollar than other currencies, because of it's unique historical position (world reserve currency, petro-dollar, euro-dollar, etc.). And from a stablecoin perspective, a soft default is a no-op. As long as they keep short duration treasuries, the stablecoin issuer can legitimaely maintain the peg at $1 per coin.
- the stablecoin issuer meanwhile happily buys $1 of treasuries, issues $1 of tokens, maintains the peg, and gets to keep the interest on the debt. At 4% per year, and $200B of USDT issued, Tether could make $8B a year while maintaining a 1:1 peg. Of course they could also be fraudulent and not maintain the peg, but that would be irrational. Why jeopardize a legit $8B profit by stealing from your customers?
Bitcoin
2025/06/21
The four anti-pillars of Marxism
2025/06/15
አቡጊዳ...? Completion of the abugida sequence
2025/04/02
Why the Ethiopian government shouldn't mine Bitcoin
2025/02/28
On the real costs of Bitcoin mining
- The global hashrate, i.e. total computing power of all Bitcoin miners in the world, is currently around 800EH/s.
- All together miners earn about 3.2 BTC total every ten minutes. This is the sum of the block subsidy and transaction fees.
- Thus to get 1BTC , it takes about 800x10^18*600/3.2 = 1.48 x 10^23 Hashes.
- Mining is done by ASIC computers which use from about 17 J/TH for the most efficient machines to 35 J/TH for the less efficient ones. Let's take the mid-point of 26 J/TH.
- Therefore to get 1BTC it takes about 1.48 x 10^23 x 26 / 10^12 Joules of energy. Converting to kWh, 1.48 x 10^23 x 26/10^12/ 3,600,000 = 1.07 Million kWh.
- The price of energy from Ethiopian Electric Power for Bitcoin miners is US$0.0314 per kWh. With Value Added Tax, the total cost of energy is a bit over $0.036 per kWh
- Multiplying the last two, the answer is $38,480 dollars of electric energy per BTC.
A lot of people who have never mined think energy is the whole cost. This is very incorrect. The price of electric energy is indeed a big variable for miners, but it's only half of the total cost. You need to add infrastructure and the machines and the operating costs. To take some nice round numbers, let's assume we have 1GW of mining.
- First you need to put in transformers, electrical distribution switchboards, breakers, cables, routers, switches, shelves, containers or buildings, air or water cooling systems, etc. This will be about $200M to $300M in capital expense. Depending on your power supply and demand in your area, and the overall environment, this investment may last 5 years, so as an amortized expense it would be about $5M per month.
- Second you have to buy the ASIC computers. At today's price, for 1GW that will be about $400M to $500M of capex on the computers. These machines will typically have a lifespan of about 4 years. So, amortized, an expense of about $10M/month
- Third you have to actually run the facility, including internet access, employees salaries etc. For 1GW, you can assume about $1M-$2M/month.
- On February 3, 2025, a website called NFT Evening posted a typical content-farm article. Full of incorrect data, nonsensical comparisons and flashy tasteless infographics. Some red flags that should alert the reader immediately. Half way down the article it says the current price of Bitcoin is $57,909.16. First of all, that week, the price of Bitcoin was in the mid ninety thousands range, briefly spiking above $100k. The price hasn't been anywhere near $57k in months. Second, why use 7 digits of precision on the price when it changes continuously? Unless you are talking about the real time price at a specific moment in time, like citing a transaction, that makes no sense. One reason could be that the author is, or thinks the reader is, impressed by the false precision of more meaningless digits. Another explanation is that the article was generated by an AI language model which accidentally regurgitated six month old data. Even the electricity prices are pretty random. They cite a petroleum website as the source. But for all we know, they were harvested from local prices published long ago, multiplied by exchange rates from a different time frame; confusing rates which vary by quantity and industry; or maybe just made up. Another red flag is the author's bio: full of the most cliché keywords like crypto, NFT, DeFi, Web3, AI... Ugh. That string is not a sign of high quality to put it mildly.
- On February 20, 2025, BitCluster (a foreign company mining in Ethiopia) posted the story highlighting the number $1,986.20 for Ethiopia. Why? This is a mystery. First of all, again going down to the cent is ridiculous as the precise number would be changing continuously. Second, more importantly, anyone even remotely connected to the real business operations would know the number is ridiculously wrong. Third, to the extent that this number is believed, it could lead to calls for massive increases in electricity price, suspicion from the tax authorities looking for hidden profits, and outright ban. Fourth, if this was true, it would mean BitCluster is gouging their own hosting customers. All things that presumably BitCluster doesn't want. I have reached out to the CEO of BitCluster for an explanation but haven't heard yet. For now, I'm going to assume a drunk marketing intern is in charge of the BitCluster X/Twitter account.
- On February 24, 2025, the X/Twitter account called Project Mano reposted the BitCluster tweet and went on an unhinged rant about how foreigners are bad for Ethiopia, how this is a national humiliation etc. When we QRB Labs corrected their number publicly, they reached out privately with long justifications for their attack. I asked the person simply if they believe the number $1,986.20. They said of course not. Literally the only data point which underpins the entire rant is false, and they know it! This was actually a shock. Honest disagreement is no problem. Ignorance and innocent mistakes are forgivable. Holding strong opinions without having skin in the game is not great but understandable. But deliberate falsehood, I did not expect. Of course it's normal in politics people lie and convince themselves the ends justify unethical means. But in this context, it may sound naive or strange to outsiders who only hear about "cryptocurrency" and "blockchain" nonsense, but there's a certain idealistic ethos among Bitcoiners. Things like honest money, proof of work, low time preference etc. are taken seriously. So to see Project Mano engage in pure falsehood and propaganda was a deep disappointment.
- On February 27, 2025, the website Addis Insight posted the same article. They literally copy-pasted the entire article from NFT Evening without attribution. I guess there's no honor among content farms. No research, no credit, no attribution, just a mindless relentless race to the bottom. It's almost a perfect case study of enshittification. The only thing missing is 2010-style "listicles" about "Ten easy steps for you to profit from this today!"
- Shortly after that it started circulating on Whatsapp. The blast radius is expanding. More and more innocent people are being fooled.
- H stands for hash, the calculation miners do.
- E stands for Exa, which means a quintillion, 1 followed by 18 zeros.
- T stands for Tera, a trillion, 1 followed by 12 zeros.
- J is a Joule, the standard unit of energy. Power is in Watts. 1W = 1J/s. And 1kWh = 3,600,000J.
- Power is energy divided by time.
2025/01/23
Datacenter potential in Ethiopia
- Security clearance. Each piece of equipment goes through lengthy "pre-import" approval and post-arrival "import release" approval processes. But everyone involved knows that computer hardware doesn't pose any cyber-security threat. Cyber threats are generally software and network based. In fact it's difficult to think of a single example in the world of a national security problem which can be solved by controlling which computers are allowed into the country. To be blunt, it is a gigantic waste of time. The national security interest should be focused on the energy security of the country. Is the power company planning the supply and demand correctly? The current approach makes no more sense that limiting the number of light bulbs that enter the country.
- Import duty and investment incentives. Capital investments are charged lower import duties. This is an understandable objective. However, the process of qualifying is extremely onerous and often arbitrary. It requires an investment license which creates enormous complexity as I've written about before. Once you start operations you have to switch from an investment license to an expansion license, which has a new set of requirements like minimum payroll etc. Each shipment has to be gruelingly reviewed and approved by the investment commission, by the ministry of finance, as well as customs commission. Besides the inefficiency, the uncertainty is huge. Imagine importing equipment not knowing if the import duty will be 3% or 40% until after it arrives. Any misstep carries the risk of huge penalties, and at worst, the equipment can in theory be confiscated. For a data center, capex efficiency is a life or death matter, so the import risks are high enough to scare away most rational investors. It makes it very hard for a company to grow investment progressively. It would be much better to simply have a constant low import duty, say 5%, for all equipment and get rid of the investment license. The businesses would be happier, and the government would likely make more revenue from the boom.
- Customs. Besides security and investment approvals, you have to go through customs. These offices are notoriously inefficient and unfair. To make matters worse, the more they delay, the more revenue they generate. Conversely, if they clear stuff too fast and at a low price, the individual customs agent can be suspected of corruption. This creates a cruel incentive for them to become ever more inefficient. A crucial reform would be to a) introduce the following key performance indicator: total customs revenue divided by average time to clear shipments. Tie it to salaries and promotions of the customs officers and their managers. Those who get the most revenue in the least time would be rewarded. And b) create a public database of assessed value and duties paid for all shipments. (The public database shouldn't have the name of the importer, just the numbers). This combination would help eliminate unreasonable delays and corruption, as both the importer and the customs agent would be incentivized to quickly agree on the correct value.
2024/07/30
Free at last
The government could simply revoke the law that says Abebe, Berhane and the banks are not allowed to exchange their USD for ETB at whatever price they agree to. That's what is meant by jargon like "float" or "unification", "liberalization", etc. Just let the two parties agree on a price. No other laws need to change. Any product that is illegal can remain illegal. Banking licenses don't need to change. Just decriminalize voluntary price. That's it.
And, surprise! That is actually the current Ethiopian government's position. Don't take my word for it. It said so in 2019: Ethiopia: Central Bank announces floating exchange rate regime. And again in 2020: Ethiopia Plans New Key Rate, Floating Currency to Boost Economy. Even now in 2023, exchange rate unification remains the goal. But the policy is "gradual", and 4 years in, the peg remains and the gap is growing. So what are we waiting for? Why don't they just waive this magic wand today?
[...]
To be blunt, the political cost of doing the right thing is very high.
Proposition AG1: Ethiopia imports more than it exports. If the exchange rate is freed, things that were imported at 50 ETB/USD will now be imported at 100 ETB/USD and so imports will be more expensive. This will cause inflation. Inflation will cause the currency to weaken further. And as the exchange rate goes up the prices will go up even more. And so we will have an unstoppable spiral of general price inflation and currency weakening.
Proposition AG2: Government budget includes a number of things paid for in foreign currency. So that portion of it will double. Tax collection is already down in the last couple of years, because of war etc..Where will it get the money? And the white people want the government to cut spending and increase taxes. The economy can't support that. This will lead to printing and inflation. Ethiopians are poor. Now they will be poorer.
Proposition AG3: The people are poor. Cost of living is high. 70% of the population earns less than 50 dollars [a month]. Inflation makes life harder for the poor.
- Customs is hell. This week the customs commission suddenly decided to freeze imports of capital goods including those that are en route and those that have already arrived and been cleared. This is a devastating cost to many businesses, including some that would be generating forex.
- Land transportation from Djibouti to Ethiopia, both trains and trucks, is plagued by congestion and insecurity.
- The Houthi blockade of the Red Sea is extremely costly for trade to/from Ethiopia.
- Political problems and violence handicap many parts of the economy, including exports.
I expect
— Nemo Semret (@nemozen) July 29, 2024
1. bank rates will rapidly converge to the current parallel market rate, maybe a bit lower.
2. market rate will not go down but it will rise more slowly, over the next 6 months, % change of ETB/USD will be less than the last 6 months.
3. longer term, ETB will strengthen pic.twitter.com/lJz0yg81z7
2024/07/07
Five books: Asia
An extraordinary book. This episode of history is strange but at the same time a bit familiar. Marxism puts "class struggle" as one of the foundations of politics. That makes class labels an extremely powerful weapon. Whether it is at the top of the national party or in the smallest village committees, all it takes is a tiny minority of sociopaths to figure out this weapon will get them power, and it leads to inevitable escalations of ostracism: capitalists, bourgeois, petit bourgeois, kulaks, liberals, the list of enemy classes always grows. The rituals become crazier, the language itself becomes insane, and the violence extreme. The Chinese cultural revolution is perhaps the largest ever version of this process. The "cancel culture" of western society in the 2010s is almost harmless by comparison but it is a prototype of this process. If you can imagine it raised to the n-th power, multiplied by a lot of cruelty and sadism, growing for a couple of decades of political madness, you can maybe get a sense of what it might have been like in China from the mid 60s to the mid 70s. Or you can just read this book.
- At the beginning, in the year 1600, it was not the British government, but a private company with shareholders in London, equipped with a "charter" from the King (basically a business license), that decided to go trade in India. I am against the idea of business licensing in general, and reading this book didn't change my mind about that to say the least!
- During most of this time, the British could not even imagine controlling India. On the contrary, they were in awe of the wealth and power of India. They had to curry favor, and beg for permission from the Mughal authorities. Their focus was to compete with other Europeans especially the French, and make money by connecting the wealth of India with Europe. If you went back to say 1700 and told a British guy in India that his successors would rule the country, it would seem completely ridiculous.
- Over 250 years, through incredible ups and downs, the company evolved from simply trading, to participating in the politics of the empire, to eventually dominating the country militarily, and then gradually being replaced by the British government. The more famous period of colonialism as we know it was less than 100 years, from 1858, when the British government nationalized the company, until 1947.
- Nowadays, the biggest companies in the global stock market are 20 to 50 years old. But the British East India Company occupied an equivalent position for over 200 years!
- Interestingly, the British started dominating India politically right around the time when they started losing their colonies in North America which became the USA. There are actually quite a few people who fought in the American war of independence, the conquest of the Mughal Empire in India, and the Napoleonic wars in Europe. Can you imagine? Pretty dramatic couple of decades.
2024/04/25
Bitcoin mining in Ethiopia: the good, the bad and the ugly
Full disclosure: I'm a co-founder of QRB Labs, the first company to introduce Bitcoin mining to the country. We've been quietly working since 2021 to do this the "right way" against tremendous odds. But this post is not our company's story. It's a skin-in-the-game opinion about how this industry should evolve for the benefit of the country. To highlight the good it can do. But also the risk of bad, and ugly.
The Good
First let's talk about the positive. Energy in Ethiopia and Bitcoin mining are a match made in heaven.
In Ethiopia, electricity generation capacity is growing very rapidly. From 2GW in 2020 to over 10GW in the next couple of years. The Grand Ethiopian Renaissance Dam (which I've written about before) is the biggest and most famous step in that growth, but there are many projects contributing to it. All of course phenomenally good. Indeed, practically nothing is better for economic growth and broadly improving lives than electrification. For comparison, the average Ethiopian has 1/50th the electricity of an American. So, until we get to 100GW at least, another 1000% growth, increasing generation is unquestionably necessary.
But there's a catch. It is extremely difficult and expensive to deliver that energy to users. In the case of Ethiopia, some estimate that $10B of investment and years of hard work are needed for transmission and distribution to catch up to generation. In the meantime, up to half of the generated energy remains unused. Which means the investment in generation takes longer to pay for itself. Meanwhile how do you finance the transmission and distribution? It's a huge chicken and egg problem, and it's unavoidable when there is rapid growth.
In more developed countries, capacity may not be doubling or quadrupling but a similar problem exists with solar and wind power. Huge investments in supply are needed, but the demand may not match up with the supply, since consumption peaks don't line up perfectly with the times when the sun shines or the wind blows. Whether caused by the difference between the time of generation and consumption, or by the distance, this is the problem of "stranded energy".
Now what if there was a way to make money from stranded energy? In Ethiopia, this revenue could help accelerate electrification! That's where Bitcoin comes in:
"the competitive dynamics of Bitcoin mining are such that it shifts in time and space to the lowest available cost of electricity. This occurs not just by deploying hardware to various locations, but also by turning miners on or off instantly. This flexible demand-side support makes mining the ideal customer to balance variable supply...." from "The Dynamics of Bitcoin Mining" by yours truly.
Thus the energy demand profile of data centers that host high energy computations makes them the perfect customer for Ethiopia's stranded energy. Bitcoin even more so than other data applications because:
- Bitcoin mining is location agnostic. It doesn't matter if it runs in Antarctica or the Sahara as long as it's connected to the Internet.
- It's also time agnostic. Each hash computation is independent of the previous one. You can mine 24 hours a day, 12 hours a day, at random times. Of course miners, in order to be profitable, must be very good at making the complex trade offs between between energy cost and hardware utilization. But they don't inherently need 24x7 power.
- Further, contrary to common perception, it doesn't actually need very much bandwidth. The entire blockchain is still barely more than half a terabyte!
- And equally importantly, it's all public data. The entire world can see all the inputs to the miners. So there's no data sovereignty, legal information jurisdiction or cyber security issue.
- Mining is purely infrastructure for running computers. There's no link between the locations of the miners and the users of Bitcoin. So Bitcoin mining doesn't depend on local regulations about money and financial services, legality of "cryptocurrencies" etc.
P.S. This post is months overdue! And it's too long. To quote Mark Twain: “I didn't have time to write a short letter, so I wrote a long one instead.”




