In stories like this you always have to ask how many bitcoins did the person own in first place that they could offer up 50k from that stash this easily. I'd say we might have had a big ass whale with a lot more than just 50k bitcoins.
I find the stories of what the sellers did with the Bitcoin they received in such transactions more interesting. 50k Bitcoin is now worth 5B, but how much did he save until today? He probably cashed out soon and invested in another property or similar.
I think it's more painful for them to realize how much money they have in their hands and spend without even realizing it.