With the high rate of buying and consistency, I believe that the address belongs to a corporation, probably an exchange. It is only such body that would be able to stash up bitcoin in this aggressive manner due to taking advantage of the price of bitcoin, together with the halving coming up next year. I don't think that an individual will be able to have such funds and put it into bitcoin. From where those funds are coming from for the various purchases,that source still has more funds flowing there. This is why I believe it is an exchange or a corporation using an exchange to keep its btc.
Yeah, it can fall to the following categories,
a. Exchanges
b. Crypto base gambling platform
c. And as what Frankly stated, it could be Michael Saylor.
But the lessons here, and this is just my personal opinion, we shouldn't like following this addresses or some kind of whale alert in Telegram or Twitter. Because it will just confused us, specially if you are new to the game. Let them do all the moving of their stash, and as long as you can keep yours, then there is no hurt done here, simple as that.