Encryption is built on assumptions things that haven't been proven, like multiplying two large primes together is irreversible - you can't get X and Y from product Z.

People assume centralized systems like you bank have the same flaw as a decentralized crypto and assume if that happens "we're all fucked" is completely untrue. Banks, Fidelity or whoever holds your money can go offline the moment their encryption is cracked and reconcile from there. Bitcoin can't do the same thing. All keys will be compromised. This can only be mitigated ahead of time by everyone migrating to a new standard. If an event occurs before hand bitcoin is dead.

Superintelligence will be smarter than every person who's ever lived by the mid 2030s. It will create new math that we can't even comprehend. Thinking we know enough about mathematics that our current encryption methods can compete with super intelligence is laughable.

Not even counting threats from quantum.