Can you give out negative effects if Bitcoin is regulated?
First of all, it will become like other things. And that's not good.
Secondly, it will lose all that is fascinating about it.
Don't forget anonymity. I'm sure there's alot of people who would love to get rid of this feature.
+1
Anonymity s the worst thing which has ever happened to BTC. It only attracts scammers and ponzi operators.