Bitcoin withdrawals surged midweek, with exchanges seeing more than $2 billion worth of BTC moved off-platform on Wednesday — a flow analysts link to potential large spot buying and long-term custody transfers.
On-chain analyst Axel Adler Jr. of CryptoQuant flagged the spike: Wednesday’s exchange outflows totaled about 31,900 BTC (roughly $2.26 billion), and total outflows for the week reached approximately 47,700 BTC — among the biggest weekly figures in the past year. CryptoQuant and CoinGlass data both identified Bitfinex as the exchange behind the single-day surge, marking Bitfinex’s largest daily BTC outflow since June 2025.
Adler called the Mar. 4 outflow “anomalous,” noting that single-day moves of this scale most often reflect large transfers into cold storage, though some can be internal custodian reshufflings. For the week through Friday, exchange flows were net negative every day — a pattern Adler interprets as bullish, since sustained negative netflow generally signals reduced selling pressure on the spot market.
He added that the bullish case would be reinforced if netflow remains negative for another three to five days without a substantial return of coins to exchanges; at that point the signal could be classified as sustained accumulation.
Stablecoin activity on exchanges supported the accumulation hypothesis. Around early March 2026 a large inflow of capital to exchange stablecoin balances — a green bar of about $1.1 billion — was recorded, and netflow had declined to about -$37.5 million as of the latest data. That mix — fresh stablecoin liquidity on exchanges while BTC leaves custody — is consistent with buying on spot markets followed by withdrawal to cold custody.
The analyst’s read is that the 31,900 BTC moved off exchanges likely reflects accumulation around the roughly $70,000 price level, behavior commonly seen when large spot purchases are executed on exchange and then transferred to long-term storage.
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