there will be manipulations that will happen,
Surely there is ,and it will be troublesome for us.Taking manipulation isnt as easy as you think and not helpful as you think,this may cost chaos in the crypto world.Prices could crash bigtime.
Regulations will have a positive impact in the investor since they feel that they are safe
when its regulated
All sort of things thats happening all have positive and negative consequences,we give up the bitcoin feature we all admire the decentralization in exchange of trust of very few big investors that will come in if the regulation will happen.