Banks Race to Build Bitcoin Rails as Individuals Hold About 13.9M BTC

A new Bitcoin Banking Adoption Index from Strategy suggests big banks are still early in building out Bitcoin services, even as retail investors continue to own the bulk of the asset. Strategy scored 25 major banks and financial institutions at 32% overall, a composite measure of how deeply each institution has developed Bitcoin-related capabilities across custody, trading, investment products, lending, and senior-level support. The metric is designed to gauge service "plumbing", not coin ownership. On the ownership side, Bitwise's Q3 2026 Crypto Market Review estimates individuals hold 66.1% of Bitcoin's 21 million maximum supply. That equates to roughly 13.9 million BTC, far exceeding the 7.8% held by businesses and the 7.2% held by funds and ETFs. Even combined, businesses plus funds and ETFs control only about 15% of supply, or roughly 3.15 million BTC. By that estimate, individuals hold close to 4.4 times more Bitcoin than those two groups together. The contrast highlights why banks are building now: the market already exists. Strategy's index tracks the extent to which banks can custody Bitcoin, execute trades, offer packaged products, and lend against the asset for clients. With individuals already holding the majority of supply, banks are responding to customer demand, ETF growth, corporate treasury participation, regulatory shifts, and competitive pressure from crypto-native firms. In practice, banks can generate revenue without owning Bitcoin. Custody arrangements allow institutions to safeguard client assets, execute transactions, administer collateral, and charge fees, while the customer remains the beneficial owner. The precise rights and risks depend on custody, brokerage, or lending agreements, including transferability and whether assets may be rehypothecated. As more holders use intermediaries, control of the customer relationship can drift away from self-custody even if legal ownership does not. To illustrate scale, if 10% of the 13.9 million BTC attributed to individuals moved into bank-controlled custody or brokerage accounts, about 1.39 million BTC would sit on bank-run infrastructure. At 25%, the figure rises to roughly 3.47 million BTC; at 50%, it approaches 6.94 million BTC. In each case, ownership and withdrawal rights would still be set by the relevant custody, brokerage, or lending terms. Regulatory and accounting changes are also reshaping incentives. The SEC's SAB 122 rescinded SAB 121, which had required entities safeguarding crypto assets for platform users to recognize a liability and a corresponding asset on balance sheets, an approach widely cited as a barrier to scaling custody. The Federal Reserve removed a prior requirement for state member banks to provide advance notice before beginning crypto-asset activities, shifting oversight into standard supervision. The OCC has said national banks may buy and sell crypto assets held in custody at a customer's direction as part of permissible custody services. The Basel Committee's disclosure framework for bank crypto-asset exposures took effect within the Basel Framework on Jan. 1, 2026, requiring qualitative and quantitative disclosures by internationally active banks in jurisdictions that implement the standard. Looking ahead, one potential outcome is broader adoption of Bitcoin-backed lending in wealth management. Banks could earn fees on collateralized loans while avoiding direct exposure to Bitcoin ownership, potentially pressuring crypto-native lenders if banks offer lower rates or tighter integration with existing banking relationships. A competing path is resistance from holders. Custody outages, withdrawal limits, fees, and counterparty risk could keep a large share of individually held Bitcoin in self-custody or on crypto-native platforms. Under that scenario, banks still benefit from ETF inflows and clients who prefer regulated wrappers, but direct custody of retail-held coins remains limited and exchanges retain key customer relationships. The broader takeaway is that Bitcoin's institutional buildout is arriving after the ownership base was already established. Individuals accumulated the coins first; banks are now building custody, lending, and product infrastructure to compete for those existing holders and the fees attached to servicing them. Source: CryptoSlate