There are open hardware/firmware wallets, like Trezor, but I don't see any need for them, unless you are using Windows or iOS.
To be as paranoid as possible:
Build your own hardware wallet from ground using any cheap SBC that could run Linux and wallet software and have USB device (could become an USB device for PC like flash or BT dongle) capable USB port.
Print private keys of your addresses with coins on paper, put it into your own safe and destroy disk where wallets with that addresses was stored.
But I still don't get why you need to store crypto. It is not savings, it should be used for payments to or from you.
If you want to really save your money, better get some useful skill lessons or buy useful tools that will always help you to earn whatever you will need.
There are open hardware/firmware wallets, like Trezor, but I don't see any need for them, unless you are using Windows or iOS.
To be as paranoid as possible:
But I still don't get why you need to store crypto. It is not savings, it should be used for payments to or from you.
If you want to really save your money, better get some useful skill lessons or buy useful tools that will always help you to earn whatever you will need.