Jamie Dimon plans to step down as JPMorgan CEO in three years, staying as chairman. The succession could reshape the bank's blockchain and crypto strategy.

Jamie Dimon elevates two executives to co-presidents at JPMorgan Chase, continuing a succession playbook with major implications for the bank's blockchain

Dimon, who turned 70 in March, has been JPMorgan's boss for two decades, steering it through the financial crisis.