A cryptocurrency start-up has taken out a full-page ad in the Wall Street Journal to take a dig at JPMorgan Chase CEO Jamie Dimon, who recently called bitcoin a "fraud". Switzerland-based start-up Eidoo launched Wednesday and bills itself as a digital wallet for people to hold ethereum, the second-largest cryptocurrency by market cap. It has plans to launch a debit card to spend both ethereum and bitcoin as well as an exchange to trade both. The WSJ ad, which is a clear public relations stunt as the company launches, reads: "Maybe Jamie will fire you. But, you'll be free to trade in the crypto-world." ... (full story)