The Fools cover two (or three) of the biggest crypto-related scams ever, totaling billions of dollars scammed and millions of investors. They first cover Bitconnect, probably the most famous crypto scam and originator of one of the most well-known crypto memes (Hey hey hey!) Then a quick preview of Africypt, which was a recent scam that is still be investigated, and finally OneCoin- the work of the Cryptoqueen herself.