Who has the private keys for the Beacon Deposit Contract and the Wrapped Ether?

mybed54
0
0

https://etherscan.io/address/0x00000000219ab540356cbb839cbe05303d7705fa

https://etherscan.io/address/0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2

These account for 15% of all ETH. How do we know these are secure? What are the odds they get exploited?