Here's an unrelated but related question:

How do you store your wallet / private keys where you would be comfortable storing an amount of money that's important to you?

It feels like a bunch of consumer grade options we have are kind of flaky:

    Flash drives are extremely undependable. I've had a few fail to read after sitting in a closet for a year.

    SSDs can supposedly have data loss pretty quickly if left unpowered (days to months).

    DVDs have decent lasting power (I have some CDs that still work after 15 years) but this makes me nervous because it's so susceptible to damage.

    HDDs also make me think what would happen if it's not powered on for 5-10+ years (it's mechanical, does it use some type of oil internally to keep friction down?).

    Putting it on the cloud seems risky, even with encryption at rest and now we need to backup the encryption keys.

    I guess tape is still our best bet?

I would also think if you have a decent amount of crypto you'd likely want to have 3 backups in your apartment along with 3 offsite backups, perhaps lock boxes in a few different banks in different towns (or even hundreds of miles apart).

Basically it still feels like a huge pain in the butt to keep digital currency secure and available. The more backups you have, the more risk you have around being compromised but the less backups you have the more susceptible you are to data loss and losing everything.