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?
I think you're just making this post to be notice here because at first you have a wrong calculation in the years since you bought bitcoin. It's only 10 years and not 12 years. Also if you really have that amount of bitcoin I think you should keep it by yourself and learns also by yourself on how to sell that.