Exacly @shanghaipreneur
Friend of mine suggested, that it could be Justin purchasing a lot on some of his proxy accounts. Knowing that he will get large amount of new HIVE token. Knowing also that witnesses will be powering down and trading steem to HIVE. So he could sell his HIVE tokens, earning quite a decent amount of money. Knowing that demand for HIVE token will be very high in upcoming days.