maybe he's just securing his money in a big exchange for fear of a problem with his wallet address,
Hm.. secure money by sending to exchange...that is unbelievable. An exchange, no matter how big is it, is the last place to secure money and whales are well aware of it. The question is, why did he send them to exchange? Large transactions usually take place on the over-the-counter market and nobody knows about them. threfore the case may be considered as an attempt to shatter the market and buy at a lower price.