centralised or decentralised exchange

I have heard lot about centralised and decentralised exchanges.
now a days almost everyone talking abt decentralised exchanges being a future.
well give a second thought. if crypto cureencies here to stay for long time than regulations are must.
now understand how decentralised exchanges can exist in future.
so its either centralised or hybrid exchanges that's have real future.
earlier everyone understands abt it better it is.
looking forward for comments

I know many wont agree and devote my blog but please give a second thought and understand before voting. and still if ur thought differs than mention in reply which will help me to understand better.