Bitcoin exchange balances decline as illiquid supply grows

Bitcoin supply on exchanges is near lows as illiquid supply rises

Bitcoin  BTC +0.00% supply on exchanges is trending toward new lows while illiquid supply continues to grow. The shift suggests more coins are moving to long-term custody and away from readily tradable venues.

Commentators writing for Benzinga estimate that only about 2.4–2.8 million BTC sat on exchanges in early 2026. Those levels align with multi‑year lows in exchange balances. In a separate timeline, CCN reported a decline from roughly 3.396 million BTC in November 2022 to about 2.483 million by late June 2025, equating to near 12.5% of circulating supply.

As reported by Cointelegraph, the share of Bitcoin held on exchanges hovered near 14.5%, a proportion last seen in 2018, while OTC balances were described as historically thin. Taken together, these data points are consistent with rising illiquid supply and what some analysts describe as conditions that could set up a supply shock if demand strengthens.

Why this matters: liquidity, market depth, and potential supply shock

Lower exchange balances can reduce immediately available liquidity and narrow market depth, meaning large spot orders may move prices more than they would in ample-supply conditions. The effect can be amplified during demand surges, though derivatives venues and OTC desks can partially offset visible spot scarcity.

Institutional custody, ETF structures, and self-custody practices often migrate coins from exchange hot wallets into venues not counted as tradable spot inventory. That trend does not guarantee permanence, coins can return to exchanges, and its impact varies by market regime. “Over 1 million BTC have left exchanges since the end of 2023. The liquid supply … has decreased by 30% over the past 18 months,” said analysts at Sygnum, underscoring the tightening backdrop.

A decline in on-exchange supply is not synonymous with a universal drop in market depth. OTC activity, market-maker inventories, and derivatives liquidity can stabilize execution capacity even when exchange reserves fall. Measurement limits, such as address labeling and custodial wallet structures, also introduce uncertainty, so figures should be interpreted as estimates rather than absolutes.

How to monitor exchange reserves and illiquid supply

Exchange reserves and illiquid supply are typically estimated by clustering on-chain addresses associated with major trading venues, then tracking inflows, outflows, and balance changes over time. Reviewing methodology disclosures, cross‑comparing providers, and noting revisions can help distinguish signal from noise.

Point‑in‑time levels may differ across datasets due to labeling assumptions and coverage, so the trajectory often matters more than a single reading. Triangulating with ETF custody reports, public treasury holdings, and OTC balance proxies adds context when exchange balances decline.

Where to track: Glassnode, CryptoQuant, Fidelity Digital Assets, Bitwise Asset Management

These providers publish dashboards and research that quantify exchange balances, illiquid supply trends, and flow dynamics. Their periodic reviews and methodology notes help interpret whether changes reflect self‑custody, institutional migration, or shifts in exchange wallet structures.

Core metrics: exchange balances, illiquid supply, OTC balances

Exchange balances measure coins held in addresses linked to trading venues, indicating readily tradable supply. Illiquid supply approximates the share held by entities with minimal spending history, a proxy for long‑term holding behavior. OTC balances provide a window into off‑exchange liquidity that can cushion or exacerbate supply tightness on public order books.