I have been familiar with BTC since 2012. When I was transection BTC, its price was very low. If those accounts are no longer there because they were on a much earlier device, those devices no longer exist.
Bitcoin aren't store in those devices, they are store on the private keys and since you are talking about many years ago, they are definitely going to be on those legacy address. So anyone with the corresponding private keys can have access to those wallets. Anyone without those keys are the ones that can actually not be able to spend those Bitcoin and just for your information, the Bitcoin you see that are dormant and hasn't been touch doesn't mean they are loss. They still have the owners.
I have seen the Up and Down of BTC, but I could not imagine that it slowly became so popular. Now, I think BTC will do very well in the near future. It is still in very good shape, though. It will cross 100k+ very soon. What is your personal opinion about BTC?
If anyone told you that Bitcoin is going to hit $100k, I will say you should disregard that information because it will take a lot of effort to get there and the way the Bitcoin sentiment doesn't look like we are going there soon. I don't want to follow the bears but the way they are bearish, seems the market is already at the top, we may be in another hear market for another time until we get another halving because this one didn't move price as many people expected.