BIS Study Reveals Sixfold Gap in Bitcoin Onchain Transfer Estimates

A Bank for International Settlements (BIS) study has found that widely used crypto metrics can obscure economic activity, with measurement challenges spanning Bitcoin, Ethereum, and stablecoins. Researchers discovered that estimates of Bitcoin onchain transfer values can vary by as much as sixfold depending on how transactions are measured—a gap that stems largely from Bitcoin's transaction structure, where unspent funds returned to the sender as change can be incorrectly counted as new transfers.

The measurement problem extends beyond transfer volumes. The BIS researchers found that Bitcoin's conventional market capitalization has at times been as much as four times higher than its realized capitalization, which values each coin at the price when it last moved. Based on an analysis of 100 billion blockchain records spanning Bitcoin, Ethereum, and Tron, the study warned that metrics such as transaction volumes, market capitalization, and total value locked often suggest a degree of accuracy not supported by the underlying data.

Ethereum presents its own classification difficulties due to the scale of smart contract deployment. Of roughly 67.5 million active contracts examined, approximately 54 million could not be categorized using the study's classifications. Stablecoin activity adds another layer of complexity: USDT on Ethereum is more closely tied to DeFi activity, with over 20% held by smart contracts in 2022, while USDT on Tron—where only around 1% is held by smart contracts—is associated more with payment-like and store-of-value purposes. The researchers cautioned that aggregating stablecoin activity across blockchains can conflate fundamentally different types of economic activity.

The findings underscore broader concerns about the reliability of onchain indicators. "Metrics such as transaction volumes, market capitalisation and total value locked often suggest a degree of accuracy that is not supported by the nature of the underlying data," the researchers wrote. The study arrives amid ongoing skepticism from central bank authorities about crypto's utility—BIS General Manager Agustín Carstens has previously stated that stablecoins are not credible for payments at scale—reinforcing calls for more rigorous approaches to measuring blockchain-based economic activity.