It's about 8 years already passed away now the owner remembered that he had some BTC around 3000. He wants to exchange them now?
Oh no, did the year died? LOL!
Anyway, OP mentioned that the funds were transferred and didn't sell.
Moreover, that person or group surely a long term holder, imagine that he missed or didn't sold his bitcoin when it's on ATH last 2017. That profit he could get tho. Or he really have a lot of bitcoin keeping on different wallets. Envy those guys, erffff.