If you are storing your cryptocurrency funds on Revolut or any kind of exchange/platform, you do not technically control and own the cryptocurrencies. In order to store for large amounts and long term it is recommended to move your funds into the wallet that you control.

Having a hardware wallet, Ledger, in your case surely helped you to ease the burden of maintaining secure devices for the funds. I suggest you utilize it fully. Also, if you need resources to learn deeper about cryptocurrency and how to store it safely, Ledger has a wonderful source you can take a look at: https://www.ledger.com/academy.