Looking your timestamp of posting, i didn't see any tweet from whale alert such amount of transfer. Although there is $200k[1] or 5500 BTC transfer but from unknown to unknown wallet, while there is 2310 BTC or $97k from unknown to coinbase[2]. So there's nothing near to what you have posted. And lastly, it doesn't matter.
https://blockchair.com/bitcoin/transaction/8b9407219580299396b43c4fc62f1ef19fbe8ec39c91be17f64b93195bca791c20 000 out, but seems like it's Bitfinex not Coinbase.
Either way, nobody cares!
Besides op how do you expect Bitcointalkers to engage in a discussion without proof you should have at least added a transaction ID.
Even with proof (see above), again, who cares if somebody is moving coins, especially OUT of an exchange!