The safety of our assets in exchanges for trading is one big thing that every one want to look closely at, and how user friendly that exchange is to its users. Binance is a very good exchange to place this staking as its flexibility and customer support is very easy to use and ready to help in any situation. Also, in its returns, another good reason to staking coins in Binance is fun. Looking at Coinbase, this will be another exchange that might be resourceful in the staking of ETH 2.0, I don't know of its interface but am sure it has a good security records for the assets of its users. But according to OP, there is no details released yet on its staking percentage.