Long limited to its role as a store of value, Bitcoin is making a decisive breakthrough into DeFi. With the launch of the Peg-BTC (YBTC) token on the Sui network, Bitlayer introduces a "trustless" BitVM bridge that eliminates centralized intermediaries. This initiative marks a notable evolution. BTC becomes a fully usable asset within decentralized protocols, previously dominated by native tokens. A new chapter opens, that of an interoperable, mobile Bitcoin now active in programmable finance.