https://www.cnbc.com/2017/10/11/jpmorgan-ceo-jamie-dimon-trolled-by-cryptocurrency-start-up-eidoo-in-wsj-ad.html

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.