Bitcoin Supply on Exchanges Drops to Multi‑Year Low

Bitcoin held in exchange wallets has plunged to levels not seen in years, data from Coinglass and Glassnode indicate, underlining a shift towards long‑term holding and tightening liquidity.

According to Coinglass, total Bitcoin reserves across centralised exchanges have fallen to approximately 2.07 million BTC, marking a fresh low measured in this multi‑year timeframe. Glassnode data confirms that exchange-held Bitcoin as a percentage of total supply has dipped below 15%—a level unseen since 2018.

The depletion has been rapid: Coinglass reports that around 65,000 BTC exited major exchanges last week, pushing exchange balances down to near record lows. CryptoQuant analysis shows hot OTC reserves have also shrunk to roughly 146,000 BTC—declining from 480,000 BTC in September 2021—signalling broader supply erosion across both exchange and OTC channels.

Market analysts interpret these metrics as evidence of sustained accumulation by both retail and institutional investors. Transfers to cold storage and self‑custody wallets are rising sharply, coinciding with surging inflows to spot Bitcoin exchange‑traded funds since early 2024. Long‑standing holders and whales appear to be shifting their assets off‑platform, leading to what many describe as a looming supply shock.

This supply constriction factors into Bitcoin’s recent upside, where the price has rallied above the US $100,000 threshold and briefly touched US $110,000. Reduced available supply on exchanges dampens immediate selling pressure, while rising demand—particularly from ETF vehicles—supports upward momentum. Sentiment indicators reinforce this stance: CryptoQuant notes more than 85% of Bitcoin holders are in profit, suggesting limited incentive to sell.

Institutional trends underpin the narrative. Major asset managers such as BlackRock and Fidelity are funneling substantial reserves into ETF custody, moving assets off‑exchange and altering the liquidity dynamic. Corporates including MicroStrategy continue on‑chain accumulation as part of treasury strategies, while some national financial bodies are exploring Bitcoin holdings.

Analysts warn, however, that reduced float may lead to heightened volatility. A supply shock typically amplifies price moves—up and down—with heavy liquidations already observed: Coinglass data shows US $203 million of Bitcoin short positions were liquidated in under 24 hours during the brief rally above US $110,000. At the same time, positive global factors such as easing US–China trade tensions and expectations of interest‑rate cuts are adding fuel to risk assets, including Bitcoin.

Examining the wider picture, the halving event of April 2024, which halved block rewards to 3.125 BTC, continues to weigh on supply dynamics. With new issuance curtailed and existing supply migrating into private custody, on‑chain metrics show persistent outflows from exchanges. CryptoQuant’s Fund Flow Ratio also points to historic levels of “hodling” behaviour.

Whale activity mirrors the shift. Over the past month, Coinglass recorded withdrawals totalling more than 56,000 BTC from centralised exchanges. At the same time, metrics from CryptoQuant show centralised exchange reserves falling by roughly 550,000 BTC since mid‑2024, tightening the supply significantly.

While most analysts interpret the current balance trends as bullish, some caution is warranted. If investor sentiment reverses or macro‑economic shocks trigger rapid sell‑off, the thin on‑exchange liquidity could exacerbate price swings. Still, the dominant view frames the phenomenon as a structural supply retraction, particularly intensified by institutional demand.