True.There will be more and more restrictions on exchanges with time,decentralized exchange is solution.I like Bitshares,but it has bugs,and lack of coins.Many popular coins don't exist there.If this wont change,Bitshares won't be solution to the problem.Ask yourself this:Why would i go on Bitshares,if i can't trade many popular coins there?Obvious answer will be: I won't go there.