Originally Posted by
monsterj
Isn't there a legit chance the bitcoins are just lost like some sort of sunken treasure? Never to be recovered again?
Without a doubt, at least some of them are. Maybe more like Han Solo in carbonite than sunken treasure, if you had no way of unfreezing him. You know he's there, you can see him, you can still measure him and everything, but if you can't unfreeze him, he's entirely useless.
If you have bitcoins in your wallet, then destroy your wallet and forget your password, those coins spend the rest of their virtual eternity right where they are, in a non-existant wallet.
If you are a criminal, and say, have 10,000 btc in a wallet, and everyone knows you stole that shit from Gox or where ever. If you know the FBI or Secret Service or whoever the fuck is just waiting for you to do something, ANYTHING with those coins so they can follow your trail, you may very well decide to never touch them again, which is essentially the same as destroying them without actually destroying them (because they can't be destroyed, obv, they can just become unusable/lost).