In your hypothetical scenario, I think I would sleep easier having tried to stop it, then to be in the same world but having done nothing to stop it.
There's no real alternative. You rely on the secrets technology we currently have, knowing it might not be future-proof for your entire lifetime, or you don't use secrets technology at all (and I guess live in fear of all possible futures?)
The chance of somebody storing my WireGuard traffic from a local public hotspot to be able to hopefully decode it at some point in the future is far less than someone sniffing dns and http traffic I send from the same hotspot today.
The value of breaking my communication now compared with in 10 years time is far higher too. My bank will have destroyed the records of my dealings in a decades time for example.
Bitcoin’s ledger is specifically designed to be kept forever though. You don’t need to target me today in the how if future payoff
There's no real alternative. You rely on the secrets technology we currently have, knowing it might not be future-proof for your entire lifetime, or you don't use secrets technology at all (and I guess live in fear of all possible futures?)