in order to break bitcoin you would have to break all 3? not just one of them?

and also, i'm speaking in the very long term. It just makes sense to me that eventually (as in raised to infinity) that at some point the cryptography would be broken while it is live whatever the itteration is at that time and that would be irrecoverable. like are there any forms of cryptography that are quantum safe?

like it seems to me that given enough time that the cryptography is it's biggest liability for long term survival.

is this all in my head? am i wrong? are cryptographers that are involved in this project not worried about this?