It is a big market and competition will arise. There are many cryptocurrency Stock Markets building up now and later. The customers will choose the best one.
The problem that remains with cryptocurrency Stock Markets is not the technology, but the trust. If some company frauds at NYSE, u can have a process of litigation, which is not possible for cryptocurrency Stock Markets. Anyone will come, pay the authority, get listed, raise money and vanish into oblivion. Due to global nature of cryptocurrency, U cant track them back.