Yes and No.
If they held their Bitcoins until now then they are f*cking rich right now. If they bought Bitcoin right from the start or even 2 years after it was created, they are still rich right now. That is if they are still holding Bitcoins until now. For sure, many here knows the person who dumped his hard drive in a dumpsite and that hard drive contains a private key that can open a wallet that holds 8000 Bitcoins. Probably there are some early adopters as well who just forgot their private keys for some reasons or the like.
No if they sold their Bitcoin holdings immediately. TBH, this is very subjective because not all early adopters did the same. Many choose to held, many choose to buy some things like Lazlo who bought a Pizza for 10000 BTC, many choose to sell for some reasons, many sold because they saw that their profits are good already.
Laszlo bought 2 pizzas for 10,000 BTC because it was nothing at the time. He was mining with a CPU and then with a GPU, getting 50 coins every few hours/days. In his own words, it was basically free pizza.
It's not like he only had 10k BTC and traded it all for two pizzas, he had lots more. And kept a bit more. He's said he's doing OK these days, not crazy rich, but also not poor at all.