I'm very novice when it comes to crypto but have gotten into bitcoin over the last year. I've followed the bitcoin thread on here quite a bit. Seems most things I see say to get it off of the exchange you buy from and put it into a cold wallet. I see the Ledger brand is fairly popular. Just a few questions/thoughts that go through my head: So, if I move my btc to a Ledger and throw it in a safe for 10 years, who's to say the little device will work when I want to cash out or that the Ledger software still exists, etc? I totally agree with not wanting to leave it attached to the Internet on an exchange, but just looking for tips to calm my thoughts.