...Dimon labeled Bitcoin “worthless,” but added that while JP Morgan cannot custody it, it can provide its customers with “legitimate, as-clean-as-possible access” to cryptocurrency.
"It's worthless but I can make money from it" is basically what this sounds to me. It reminded me of the saying there's money to be made in junks. I'm not comparing BTC to trash but that's probably how Jamie sees it.
Just let him talk and talk. People who believes in him are decreasing.