Mere searching the address on google I found a tweet that linked the address to binance.
Although the tweet was made in 2018 but I guess that should satisfy your curiosity as to why the address has moved that much bitcoin.
I think OP never saw such a big amount of BTC in a single wallet, well my reaction was also the same when I first saw billions of dollars sitting in a single wallet, but I controlled my excitement and did not make any topic, I think OP thought, some illicit activity is going on here. Whatever the OP have thought, this post must have relaxed him.
I guess, when Binance made this tweet, there must be a fud ongoing about lower liquidity in Binance exchange and to prove the liquidity they have, they must have given these addresses. Binance has made a good reputations so far, and I sometimes wonder, how it falls into the authorities hands. (I do know the reason but showing the expression only).