I'm currently experimenting with building a USB Multi Coin Wallet. To do this I'll run AntiX, a minimalist Linux Operating System, installed on a USB flash drive, to support the wallet.
I know this may not work as well as something like a Ledger Nano S, but it's security will come in part from the fact that it spends most of it's time in a drawer instead of on the hard drive of an inter net connected machine.
Another advantage is that you can boot up just about any computer from this USB drive and don't need to lug around a laptop, or pay a service contract for a phone to use it.
My questions to any reader is; do you have any experience in building such a set up, or do you think it might be an interesting option for many people?
Please leave a comment letting me know what you think.