I wonder if this cryptomarket will end up to have like high marks on the mafia-market and if people would start to make like ''crazy'' decisions when it comes to BTC !!
This is possible that is why we need the regulation so that Bitcoin will not be use by these criminals and to ensure criminal rate will not increase just because of Bitcoin but there are people are selfish that they don't like regulation because of tax in which they only think of themselves but not the welfare of entire community.
You want to say that criminals do not use dollars, or will the regulation of crypto-currencies reduce crime and money laundering

Bitcoin is a decentralized system, it was not created to regulate it.