This doesn't matter at all. It is already hitting the market dude and we can be holding now a scammed bitcoin. But then again it's too unnecessary to know where your holding are from, as it is only a currency, a money, and not a thing that has your name or records its past. Are you even sure that the bitcoins you hold right now isn't from any other illegal activities from the past nor had been generated illegally? Or should I say, is there anything illegal in the aspect bitcoin and cryptocurrencies?

hence, whatever those Bitcoins are from. It is just money, nothing more, nothing less.