Apologies to be blunt, but I believe the answer falls something along the lines of: "None of your business".
When it's your money, you can wonder about what to do with it. If it's not yours, then what the owner is or isn't doing with it is of no concern to you.
Absolutely, that's their business. But I think today's generation should also give props to those who supported and owned BTC from the start when it was dirt cheap. Because anything is possible from anywhere, and what I'm thinking is that the current status of Bitcoin owes a lot to those who still embraced it when it wasn't known by many. It's a level where someone supported it without necessarily expecting huge profits from Bitcoin, quite different from our mindset nowadays.
Interestingly, when those old wallets wake up, the market gets a bit shaken. No one knows about those old wallets, whether they can still be accessed or if they've lost their owners.