The answer is always going to be yes (possible), and up to a certain degree, it will be up to you how likely it may be to happen. Some of the posts above already give pointers to pre-emptive measures you can take.

There is also a topic on what to do where it to happen. Reading through you’ll see that staking a bitcoin address you fully control (i.e. generally one from a non-custodial wallet), from which you can sign a message, is one of the centre piece in account recoveries. (PGP is a valid alternative, but most go with the bitcoin staked address).