Basically, cryptocurrency regulation is good for crypto investors in the sense that they may be safe with the ICOs they're into but for some, it can be bad because there will be limitation already of crypto use. Tax on your earnings from cryptos, for example, will be mandatory and thus taking a slice of your total earnings no matter how small it is.
One big problem with people is that they want contradictory things, they want to have the possibility to make a lot of money through icos but at the same time they do not want to accept the huge risk that an investment in an ico carries, so they want regulations to protect them but if that is the case then the profits will no longer be there, this is why if the market of icos is regulated is completely irrelevant to me, I took my choice and my choice is bitcoin.