Oh Jonny walker finally opened s/he wallet. Most old wallets are being abandoned by the owners long ago. Maybe they kept it as a long term investment which finally paid off.  I think new generation investors should learn from this as it can be a good teacher or point to learn from. Atbthe early stage these investors bought or mined and kept for a longer time believing their investment to pay back after a long time and here this particular investor took profit not just profit but a good amount of money for holding a long time.
OP your points are quite alright maybe a good follow up might reveal more to the wallet activities.