For most of the past decade, the world’s largest bank treated public blockchains the way a cautious driver treats a busy highway: something to be watched from a distance, never entered. That posture changed again on Monday, October 19, 2026, when JPMorgan Chase said it is bringing JPM Coin, its dollar deposit token, onto Ethereum mainnet. The move puts the bank’s on-chain cash rail on the same public network where its tokenized money-market funds already live.