We have no idea on who is the owner of this address is, all we can do is speculate and guess so I think it is better to leave it be until we get more information that can point to the owner of that address.
If this is not from an exchange or from huge company, this simply means someone is accumulating. Hopefully this is not being accumulated to be dump on the current dipping market. If it does we might revisit sub $20k BTC price.
..Other allegations point to Robinhod ..
Based on
Binance article, it's from the Robinhood Markets Inc.
But I didn't find an answer that Robinhood confesses this accusation.
Yeah I saw some news about this and said the same below belongs to Robinhood Markets Inc. but maybe they keep the existence of this a secret even though it has been crowded into the news.
Hopefully that is the case, that the wallet is indeed belong to Robinhood Markets Inc.