Which ledger do you have? I have both a nano s and nano x, and the nano x allows a ton more applications on it.

Also the accounts are tied to your keys, so changing applications around on the ledger s shouldn't be a problem. I use the ledger X as my main, and ledger s as a backup.

Remember: not your wallet, not your coin.

I recently go an older antminer S9 just to play with and see how it was built, etc... As I was experimenting with it, I realized if I set it to around 1100 watt draw, it puts out a nice slow stream of heat like my under desk foot/leg heater does with a tolerable noise level.

The miner is not very profitable, but does at least cover it's own electricity bill. I decided to build a little cart out of scraps and use the miner as my leg/foot warmer. Now my piggies stay warm and the "heater" pays for itself.

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Yeah there's not a lot you can do about screwing up a transfer. Much like a wire transfer, it's just gone.

Accounts getting locked or providers going down and losing your coins can be mitigated by having a hardware wallet and controlling your own private key. I can't stress the saying enough: "Not your wallet, not your coin."