fifteen years ago I decided to fiddle around one winter and learn a newfangled thing called "bitcoin" and setup my computer to run 24/7 and heat my apartment as a benefit
after mining a dozen coins which were worth next to nothing then, I gave up and took apart the PC and put it away
fast-forward to 2020 and covid/long-covid has now rotted my brain, swiss-cheesed my mind to the point I cannot remember the password for the life of me
I was too clever then for future me, and used a long passphrase that made funny sense then but beyond me now
(they are worth over a million dollars at times now)
In hindsight:
go find a book in your library and pick a random page and write the password or a significant hint to the password on that page and then put it away (don't put any other indication on that paper)