This is in terms of bitcoin (as software and server) security
But from the point of view of protecting Bitcoin (as money ) from monopoly and controlling it, it remains a problem
Because we are now moving from the idea of decentralization to centralization
We need to protect it from people who don't belong to humanity
Anyway, they are idiots they will monopolize it until it becomes worthless ( And this is a theory maybe )
I believe that Bitcoin will become more and more decentralized in the future. Although there are now many big players monopolizing Bitcoin. But I believe that as the global consensus of Bitcoin becomes stronger and stronger, more and more users will hold Bitcoin. Bitcoin will become increasingly decentralized. In this way, there is even less power to control Bitcoin.