I believe we are talking about different events but anyway. Why would BK dump such a huge amount at 5k when he could easily pump the price to at least 5 times more with just a few tweets? Considering the money that he makes from his other ventures, I really do not see any sense in him dumping NAUT at these prices.
Maybe it wasn't him, some on slack have followed his wallets and thought those dumped coins were his. If it was bk I have no idea why he would dump a single coin at these prices. I'm guessing like everyone else.