For me, blockchain technology is already a success. What these regulators doing is yes they are fighting with cryptocurrency and the only way they are first working are these big companies that are related to cryptocurrency just like centralized exchange, why? because they can't directly attack the cryptocurrency, so they are only on that level.
It's true that even blockchain technology is very extraordinary and very important to the future. Even attacking cryptocurrencies is impossible with today's most sophisticated computers.
The decentralization that is being promoted means that attackers have to rack their brains to attack all computers connected to the network. This is different from centralization which only exists on one complete server belonging to a company or bank.