Bitmine, the publicly traded mining firm, now controls close to 5% of the total Ethereum supply, according to its latest treasury report. That stake, valued at roughly $12 billion, makes the company one of the single largest holders of ETH — and it's raising questions about how much concentration the market can stomach.
The size of the position
Five percent might not sound like a lot, but in crypto it's a massive chunk. Ethereum's total supply sits around 120 million coins, meaning Bitmine holds roughly 6 million ETH. That's more than most exchanges, funds, or even the Ethereum Foundation itself. The company built this position over years of mining and strategic buys, and it shows no signs of selling.
Concentration at this level creates real risks. A single large holder can sway prices with a modest sell order, especially in thinner order books. If Bitmine ever decided to liquidate a significant portion, it could trigger a cascade. There's also the governance angle: Ethereum's proof-of-stake system gives voting power to stakers, and Bitmine's stash gives it outsized influence over protocol decisions. The community has long worried about centralization, and this is a concrete example.
Bitmine hasn't signaled any plans to reduce its position. The company's treasury strategy has been consistent: accumulate and hold. That leaves the market to weigh the risks on its own. Regulators haven't commented, but the growing concentration of ETH in one entity's hands is the kind of thing that tends to draw attention. For now, Bitmine remains a quiet giant in Ethereum's economy — and a growing source of unease.
