New onchain analysis from Glassnode suggests that bitcoin’s market structure is being shaped by an increasingly tight supply of coins available for trade. According to the firm, roughly 78% of the circulating bitcoin supply is now classified as illiquid, leaving only about 4.2 million BTC in what it describes as constant circulation. Out of an estimated 18.58 million BTC already in circulation at the time of the report, about 14.5 million BTC were categorized as illiquid.
The finding matters because bitcoin’s fixed monetary design often draws attention to total issuance, but market behavior is driven just as much by the portion of supply that is actually available to buy and sell. If a growing share of coins is held in wallets that rarely distribute BTC back into the market, then effective tradable supply becomes much smaller than headline circulation figures imply.
How Glassnode Frames Bitcoin Liquidity
Glassnode said bitcoin liquidity is measured through the average ratio of received and spent BTC across entities. In simple terms, the framework attempts to distinguish between holders who tend to accumulate and retain coins and those that more actively recycle coins into the market. Under that methodology, coins held by entities that rarely spend are classified as illiquid, while coins that move more readily are treated as liquid or in active circulation.
The researchers argued that such a high share of illiquid supply points to a market dominated by hoarding rather than distribution. In its public commentary, Glassnode said the fact that 78% of circulating BTC is illiquid makes that supply “hardly accessible for buying,” a condition the firm described as supportive of bullish sentiment. The core idea is straightforward: if holders are reluctant to sell, sell pressure falls, and any increase in demand can have a stronger impact on price.
Why Supply Tightness Matters for Price Action
The report links bitcoin’s price strength to a tightening liquidity environment. While exchanges still hold substantial BTC balances for trading, Glassnode’s broader conclusion is that the available market float has been shrinking as more investors choose to hold rather than sell. That dynamic can amplify upside moves when demand rises because new buyers are effectively competing for a smaller pool of readily available coins.
Glassnode also noted that over the course of 2020, an additional 1 million BTC became illiquid. The firm interpreted this as evidence that investors were increasingly adopting a long-term holding strategy. In the context of a market rally, that matters because reduced circulating supply can intensify price momentum even without a dramatic increase in freshly issued coins or exchange balances.
The researchers went so far as to suggest that the then-current bull run had been driven, at least in part, by an emerging bitcoin liquidity crisis. The phrase does not imply that bitcoin itself is unavailable, but rather that the volume of BTC willing sellers are bringing to market may be insufficient relative to growing demand.
Institutional Buying and Treasury Accumulation
Another important piece of the supply picture is accumulation by institutions and companies. The article notes that large financial institutions and well-known hedge fund managers had been purchasing bitcoin in significant quantities over the year. At the same time, publicly known corporate treasury adoption was expanding quickly.
According to the report, a list tracking bitcoin treasuries showed that 29 well-known companies collectively held around 1.1 million BTC as reserve assets. Coins moved into treasury strategies are less likely to trade frequently, which can further reduce available market liquidity. In that sense, institutional participation does not automatically increase market depth; in some cases, it may instead absorb supply and remove coins from active circulation for extended periods.
This trend adds to the broader narrative that headline circulation numbers can be misleading when evaluating real-time market dynamics. Bitcoin may have millions of coins in existence, but if a significant portion is held by long-term investors, corporate treasuries, and entities with low spending behavior, the practical supply available to clear new demand is much smaller.
Exchange Balances Suggest a Similar Direction
Exchange reserve data cited in the article points in the same direction. Based on Bituniverse’s “Exchange Transparent Balance Rank,” which draws from Peckshield, Etherscan, and Chain.info, exchanges held fewer bitcoins than they did the year before. Lower exchange balances are often interpreted by market participants as a sign that investors are moving coins off trading venues and into custody, potentially reducing near-term sell readiness.
Among exchanges, Coinbase was reported to hold about 870,000 BTC, the largest disclosed reserve in the ranking. It was followed by Huobi with 252,000 BTC, Binance with 215,000 BTC, Bitfinex with 142,000 BTC, and Kraken with 137,000 BTC. These are still substantial balances, but the broader trend highlighted in the report is that exchange-held supply appears lower than in the previous year, reinforcing the idea of declining liquid availability.
That distinction is important. Exchanges can hold large reserves and still coexist with a market experiencing a tightening liquid float. What matters is not simply the absolute number of coins on platforms, but whether the broader investor base is becoming less willing to part with coins over time.
A Pattern With Historical Echoes
Glassnode said there is a clear relationship between bitcoin’s liquid and illiquid supply composition and the BTC market itself. The firm added that since 2017, illiquid supply had grown faster than new bitcoin issued by miners. That observation is notable because it suggests demand from accumulators has been absorbing newly mined supply and more, gradually tightening available float over time.
The report further said that a similar pattern was visible during bitcoin’s 2017 rally. If that comparison holds, then today’s market may share an important structural trait with prior bull phases: reduced availability of tradeable coins during periods of rising demand. For investors and analysts, this creates a useful lens through which to evaluate price action beyond conventional metrics such as total supply, market cap, or daily volume.
In practical terms, the data supports a view that bitcoin’s scarcity is not only a matter of protocol design but also a matter of holder behavior. A capped supply of 21 million coins is one part of the story. The other part is how many of those coins are actually circulating in a way that makes them accessible to buyers at current prices.
As a result, Glassnode’s findings strengthen the argument that bitcoin’s market can become increasingly supply-constrained during accumulation periods. If long-term holders, institutions, and treasury buyers continue to absorb coins while exchange balances trend lower, the gap between nominal supply and effective market supply may remain a major factor in price discovery.