Why BitMine is stopping its Ethereum purchases at

BitMine is stopping because it is hitting a self-imposed, pre-announced target — not a change of heart. BitMine Immersion Technologies (NYSE: BMNR), the Ethereum treasury company led by Chairman Tom Lee, announced at Token2049 on October 7, 2026 that it will halt its weekly ETH purchases once its holdings reach 5% of Ethereum's circulating supply. [VERIFIED - independent source: https://www.coindesk.com/markets/2026/10/07/ether-is-about-to-lose-a-steady-buyer-as-tom-lee-says-bitmine-will-stop-token-purchases] This was always the stated plan — the company has publicly branded the milestone as the "Alchemy of 5%" and has been reporting progress toward it for months.

Where it stands now (as of Oct 7, 2026)

[VERIFIED - independent source: https://www.prnewswire.com/news-releases/bitmine-immersion-technologies-bmnr-announces-eth-holdings-reach-6-02-million-tokens-and-total-crypto-and-total-cash--marketable-securities-holdings-of-17-4-billion-302897949.html] [VERIFIED - independent source: https://www.eqs-news.com/news/corporate/bitmine-immersion-technologies-bmnr-announces-eth-holdings-reach-6-02-million-tokens-and-total-crypto-and-total-cash-marketable-securities-holdings-of-17-4-billion/ed4a0fe4-4e0a-4a2d-b1d6-87e51df9a4eb]

The reasons behind the cap, per the reporting

1. It was a pre-committed accumulation target, not a reaction. Tom Lee said in May 2026 that at the then-current pace BitMine would hit its 5% goal in about six weeks, and that it would then "shift its focus to staking and share buybacks." The October announcement is the execution of that plan.

2. Capital reallocation to staking and share buybacks. After the accumulation phase ends, the company intends to pivot its capital allocation toward staking its ETH holdings and continuing an aggressive share repurchase program (a $4 billion authorization; ~19.1M shares repurchased since July 1, 2026). The bulk of its ETH is already actively staked.

3. Concentration/risk management. Capping at 5% of total supply is a deliberate ceiling that limits single-asset concentration in the treasury — a governance-style guardrail rather than a bearish signal. The company simultaneously frames itself as bullish on crypto, citing ETH accumulation, buybacks, and staking scale as key drivers.

Market impact of the announcement

• ETH fell ~5% on the news (ETH $2,556.51, down 5.02%).
• BMNR stock fell 6%.
• Analysts frame this as ETH "losing a steady buyer" — BitMine has been the largest corporate holder of ETH, so the removal of its recurring weekly demand removes a structural bid.

Caveats / uncertainty

• The precise internal rationale (whether the 5% cap is primarily risk management, capital allocation, or optics) is not formally documented by the company beyond the "Alchemy of 5%" framing; the "shift to staking and buybacks" explanation comes from Tom Lee's public statements and press releases, which are first-party promotional claims.
• The ~5% ETH price drop is a market reaction to the announcement; whether it reflects a durable trend or a one-off repricing is not yet established. The contrast strengthens the narrative that BitMine's buying was a meaningful demand source, but the size of any lasting effect is unclear.