It's a kind self insurance.

Nostr to hedge against the government or centralised platforms silencing or banning your offer others speech.

Bitcoin for if the central banks keep inflating the money supply or your retail bank stops servicing you.

As with all kinds of insurance, you want it place before the disastrous event occurs. You can only really insure against future transgressions.

When you eventually find Nostr & Bitcoin, you realise just how certain those future events are & you're glad that you're somewhat prepared for them.