Being digital does not make it safer.

Decentralization is also relative. A large enough power could disrupt the most active blockchains, given enough funds.

Andreas Antonopoulos talks about the cost for a nation-state to attack Bitcoin. It's extremely expensive.

But being extremely expensive does not mean that a major world power couldn't disrupt it if they chose to do so.

The question then would be: what would they stand to gain from such an attack? Is the potential gain higher than the cost for the attack?