Bitcoin a colossal pump-and-dump scheme: Former PayPal CEO
Former PayPal CEO Bill Harris has said that world's largest cryptocurrency Bitcoin is a "colossal pump-and-dump scheme, the likes of which the world has never seen". He said promoters "pump" up the price of a security creating a speculative frenzy, then "dump" some of their holdings at artificially high price. He added that Bitcoin is the "greatest scam in history". 