The difference is watches and corvettes typically appreciate in value, where as computer hardware typically drops like a rock.
Both of those things' value drops like a rock as soon as you buy them and, at least for cars, they don't all appreciate. Most don't. Even so, they appreciate at an incredible slow rate.
I can't speak for watches but I'd be surprised if it wasn't the same situation.
At least the gpus can create value after you buy them before they are worthless.
Some, and the market fluctuates a ton.
> corvettes
Only the oldest, most unique model years: nobody is buying (C4-C5-realistically C6) mid-90s or early 2000s Corvettes for more than what they paid for them, and they never will.