Kraken's dominance in Europe is the closest analogue, I think, and it's also an American company complying with American laws. If they ever sort out ACH and ca

Kraken's dominance in Europe is the closest analogue, I think, and it's also an American company complying with American laws. If they ever sort out ACH and card payments for the U.S., I don't see what keeps them from taking a huge bite out of Coinbase's U.S. retail customer base.