Ledger Nano or any other hardware wallet is not that necceseery if you understand and know what you are doing in terms of keeping your private key private and secured. Paper wallets can be as good as hardware if you are looking to hold your coins for longer period. Although harware wallets are one of the most easiest options for people without much tech knowledge.
Hardware wallets are much more convenient than Paper wallets. If you want to store your bitcoins for longer periods, then
Paper wallets is ideal, but if you want to use it every day, then Hardware wallets like the Ledger is more suitable. The process
to access the bitcoins on these Paper wallets are the weak link, not the Paper wallet on it's own. {You have to sweep those
private keys and expose them to the internet}