Erik Voheres made his first bitcoin fortune by defrauding people millions through feedzebirds.
Roger Ver made his first substantial sums of BTC by importing MtGox to the USA and earning substantial fees in the process while the exchange was in fact running bankrupt. The only reason he avoided jail time was because he had anulled his citizenship, while his close partner Charlie Shrem did 2 years simply for running an exchange while on US soil!
Mircea Popescu (now reportedly dead) earned BTC that later became valuer millions in $ through misleading fees and trading junk securities on his own exchange.

Can you name more now millionaires that earned their wealth through scamming people out of their BTC? Ideally originating in this forum.