BitGo had 64B USD in assets under custody. BitGo is the biggest custodians for exchanges and "wallets" but also custodied BTC for El Salvador for example.

All BTC backing "wrapped BTC" are also held by BitGo. That is 162.000 BTC.

That is a lot but many believe, BlackRock and others would overtake BitGo quickly if spot ETFs were approved. Or would BlackRock custody with BitGo?