They all charge almost no fees and there is almost no money to invest for interest. Monzo is very transparent with their financials and when I checked in mid 20

They all charge almost no fees and there is almost no money to invest for interest. Monzo is very transparent with their financials and when I checked in mid 2018 their account balances totalled a mere 150 million USD. A single rich person might have that in an older bank.