Circle now allows people to swap their BUIDL shares for USDC, a major stablecoin.

BUIDL is a digital fund by BlackRock on Ethereum, offering dollar returns as tokens.

BlackRock manages the fastest-growing Bitcoin ETF and introduced BUIDL as their first tokenized fund.

Tokenizing real assets like funds is becoming popular, according to Circle's CEO.

BlackRock has been involved in crypto for years and works closely with Circle.

The Circle Reserve Fund, managed by BlackRock, includes cash and short-term U.S. Treasuries.