If you’re a whale and want to someday liquidate this, ideally at higher value, you want the world to see big things like this. It will remind people that bitcoin network is still very much alive despite the repeated death sentences made by supposed financial experts.
Well, on the other hand you can also look at this and think, I better not put any money into bitcoin, cause there are individuals out there that could single-handedly destroy the price by cashing out. And you might say, it is in their interest not to do that, but I think it is in their interest to be the the first one to do that.
Nah, the smarter plan is to keep the dream of bitcoin alive while you trade your bitcoin for other assets; this is how companies buy other companies with stock-only purchases.