Me and a friend also mined a ton of bitcoin around the same time on his PC. We forgot about the whole thing when it turned out that you couldn't do anything useful with it. I wonder if the keys are still somewhere on a disk on landfill.
That's what I used to say, until I ran out of spare bedrooms, and the tunnel of carefully stacked old computers collapsed on me. Luckily I escaped and was able to buy a 32 TB NAS which is now 1% full of early 2000s disk images. Now it's just me, a NAS, and a mattress on the floor. I'm never going back.
this is why I never thrown out old computers or wipe out disks. They just sit around. Never know when you might need something on there