Hello
after 12 years i remember i bought bitcoin in 2010
is it possible to sell more than 50,000 bitcoins at once or is it better to sell direct to a private individual like grayscale or microstrategy?
Oh whoa, congratulation, dude!

I wouldn't recommend selling all bitcoins at once because then it'll lead to a drop in the price of bitcoin. It's better to sell in small parts. I think that the price of bitcoin will rise again soon, so selling coins in parts is a more logical solution.