>How to *safely* acquire, store and spend XMR
An optimal XMR user set-up involves 2 separate wallets: an offline cold wallet (savings account) and an online hot wallet (chequing account) for everyday spending. XMR amounts larger than a few hundred dollars worth should not be stored on a hot wallet for obvious reasons. So ideally, you'll want to direct all payments/donations to your cold wallet by default and then transfer smaller amounts over to your hot wallet as necessary.
Relying on 3rd party hardware wallets comes with certain security caveats so they are not recommended. Instead, its surprisingly easy to engineer a very robust storage solution yourself using readily available hardware: a laptop and a smartphone.
>Laptop
This will be running Featherwallet and must be *permanently* disabled from ever connecting to the internet again! That means physically removing the M.2 Bluetooth/Wi-Fi card and gumming up the ethernet port with superglue.
OS should be Linux rather than Windows, preferably a Debian-based lightweight distro. Encrypting the relevant user directory with LUKS is recommended but not essential.
It must have a functional webcam.
>Smartphone
This can be your primary device. It will host both your hot wallet e.g. Cake, Monerujo, etc and the NERO view-only wallet that is paired with your laptop.
To set everything up: https://4rkal.com/posts/feathernero/
NOTE: if you don't have a laptop you can use another smartphone and install the ANON wallet onto it, its essentially the same thing but with somewhat weaker security guarantees. Video guide: https://www.youtube.com/watch?v=oJqYzZyqyno
>In a nutshell
- you accept all (substantial) payments to your cold wallet.
- you monitor incoming payments on NERO.
- you initiate the transfer of funds from your cold wallet to hot wallet on NERO and sign the TX on your laptop via QR codes.
- you spend the funds and help grow the XMR economy.
FYI this is the most secure storage solution currently available.