When asked if he’d take a look at a European lender, Dimon has said — correctly — that it makes little sense for the world’s most profitable bank to add branches in such a fiercely competitive market, where returns are barely half what JPMorgan makes. Instead, he’s reportedly looking at starting a digital bank in the U.K. He may even try to buy an upstart British challenger, Starling Bank, according to some press reports. But that would be small fry.