Isn't 50,000 BTC only equivalent to 3000 byteball?
Yep... 3000 for next round... 3600 for next... 4300 next... etc... It's some serious money and a pretty good reason not to do something dumb like directly dumping the market.
Been said before. Not that easy to just dumb this. Slow bleeding is needed or otc trade. otherwise he will move market badly.