Circle cirBTC Supply Tops 5,000 as Bitcoin DeFi Adoption Grows

| cryptobriefing.com
Circle’s cirBTC supply has surpassed 5,000 tokens, rising from roughly 40 in mid-August 2026 and marking more than 100-fold growth since launch. Introduced on 8 June 2026, cirBTC is a 1:1 Bitcoin-backed ERC-20 token designed to bring BTC into Ethereum DeFi lending, borrowing and collateral markets without requiring users to sell their Bitcoin. Each cirBTC is backed by native BTC held in segregated custody by Circle National Trust, a federally chartered trust bank. Chainlink Proof of Reserve provides on-chain verification of the reserves. Around 24 September, reported circulating supply was approximately 4,300.68 cirBTC against reserves of about 4,448.19 BTC, while the latest supply figure exceeded 5,000 tokens. Users can mint and redeem cirBTC through Circle Mint, using infrastructure compatible with USDC. The token is available on Ethereum and Circle’s Arc blockchain, whose mainnet launched as a planned milestone on 16 September. Circle is positioning cirBTC as a regulated, institution-focused alternative to WBTC and Coinbase’s cbBTC. The key trading issue is liquidity. cirBTC’s rapid growth may increase demand for BTC collateral and institutional DeFi strategies, but it still needs deeper liquidity across major DeFi protocols to challenge larger wrapped Bitcoin products. The development is therefore unlikely to have a significant immediate effect on BTC’s spot price, although broader adoption could support Bitcoin’s long-term utility in on-chain markets.
Neutral
The news is neutral for BTC’s direct price impact. cirBTC’s supply growth is a positive adoption signal because it creates another route for Bitcoin to enter Ethereum and Arc-based DeFi markets. Institutional custody, redemption access and Chainlink Proof of Reserve may also improve confidence in using BTC as on-chain collateral. However, cirBTC remains small compared with established products such as WBTC and cbBTC, and its liquidity across major DeFi venues is still developing. The reported reserve and circulation figures indicate infrastructure growth rather than a large change in Bitcoin buying or selling pressure. In the short term, traders are more likely to focus on liquidity, spreads, integrations and lending demand than on the announcement itself. Over the longer term, stronger institutional adoption could increase BTC’s utility and collateral demand, but the event alone is unlikely to produce a material move in BTC’s spot price.