Coinbase is one of the biggest crypto exchanges in the world and this San Francisco-based company also operates a crypto custody service called Coinbase Custody. Source: almost 2 years ago

Coinbase launches Crypto Asset Custody for Institutions, supporting Ether and other cryptocurrencies. Source: over 2 years ago

Maybe. I am not saying he leaves his bitcoins on Coinbase exchange by the way. I mean this: https://custody.coinbase.com/. Source: almost 3 years ago

Yes, you pay them to keep your assets safe, just like you'd pay a security company to guard a vault or any other asset. I imagine their are insurances in place as well. https://custody.coinbase.com. Source: almost 3 years ago

If you go to https://custody.coinbase.com/ you can see that Coinbase Custody is for institutions. Coinbase will mimic their customers investments, but they have to publicly disclose what crypto they buy and for how much(?). Source: almost 3 years ago

Metal (Metallicus Inc) the core developer is already generating revenue today with a functional licensed MSB and exchange in the United States (metalpay.com) which is soon integrating Proton blockchain as its core backbone for noncustodial transfers, identity, and signing. Source: almost 3 years ago

Maybe you should check the metal (MTL) project and the proton (XPR) blockchain. With their app you can basically give your wallet a human name within their blockchain. Source: about 3 years ago

Metalpay.com shows that BNB is an "available crypto" so I'd go with this option^. Source: over 3 years ago