Don't overthink it. How would you secure some gold nuggets worth $5,000?

Do that for your cold storage.

Unless you live in a rough neighborhood or near one, you don't need to over secure. Sometimes that will lead to bad behaviours that compromise the security and makes it worse.

If you have a lot, then you should consider more advanced solutions using multisig, but don't rush into bad security. It's better to secure a little well, than to lose a lot because you rushed.