To me, this is a bit suspicious information, because maybe some 2-3 years ago there was information that Coinbase only had a little less than 1 million BTC in its possession, and now suddenly that number becomes twice as large. This is, at first, very worrying information, considering that so much BTC is in the custodial wallet on only one CEX, and on the other hand, maybe it's just a matter of showing strength in front of the competition.

I expect other big CEX CEOs to come forward and post their numbers, just let them make sure that the total number of BTC they keep does not exceed the 19+ million that have been mined so far