Bitcoin extended its slide below $83,000 after failing to hold a breakout above $85,000, as thin trading volume and profit-taking by short-term holders weigh on the market. A separate debate over Ethereum researcher Justin Drake's "bunker mode" warning about AI-driven threats to wallet cryptography is splitting opinion, while rising Treasury yields add pressure from outside crypto.
Bitcoin dipped to about $82,300 before recovering to around $82,800, roughly 4% below Tuesday's high near $86,600. The CoinDesk 100 index has lost close to 2% over 24 hours.
Bunker mode splits crypto researchers
Ethereum Foundation researcher Justin Drake used a post on X, viewed almost four million times, to urge the industry to begin planning for what he called "bunker mode" — a gradual migration of funds to new addresses whose public keys have never been exposed. He argued that AI-driven advances in mathematics make it reasonable to brace for a break of the elliptic-curve signatures securing bitcoin and ether wallets in months rather than years, pointing to a batch of 722 mathematical results released by OpenAI this week as evidence.
Not everyone agreed on the urgency. Ethereum co-founder Vitalik Buterin said the risk from AI-accelerated math should be taken seriously but advised holders against scrambling to move funds. Samson Mow, CEO of bitcoin technology firm Jan3, told followers there was no need to panic. According to Mow: "because an Ethereum researcher is saying silly things"
Thin volume meets profit-taking
However, the AI-cryptography debate isn't the only pressure on price. Bitcoin has fallen nearly 5% this week after repeatedly failing to hold above $85,000, trading around $83,100 as weak volume and profit-taking blunt attempts to reclaim that level. Combined spot and ETF trading averaged $6.8 billion a day over the seven days through Oct. 6, lower than on 90% of trading days since January 2024, according to Glassnode.
As a result, sellers approaching the market have increasingly been recent buyers sitting on gains. About 86% of all bitcoin sent to exchanges on Oct. 4 came from short-term holders moving coins at a profit, the highest share in a year. Roughly 92% of short-term holders remain in profit, equivalent to about 3.27 million BTC, though the average cost basis for coins bought between one week and one month ago sits near $81,900 — about 1.4% below the current price.
New capital trails the rally
Fresh capital has also struggled to keep pace with bitcoin's gains. Bitcoin drew an estimated $4.9 billion in fresh capital over the 30 days to Oct. 5 from spot ETF flows, stablecoin growth and corporate treasury purchases, while the network's realized capitalization rose by about $12.8 billion over the same period. New money therefore accounted for less than two-fifths of the increase, with most of the gain coming from existing holders reselling coins to each other at higher prices.
Away from crypto, the 30-year Treasury yield climbed to 5.71% ahead of a $22 billion bond auction, after Fed minutes showed most officials expect another interest rate increase by year-end.
Sources: CoinDesk, CryptoSlate, Crypto Briefing
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