I've read this method more than 10 years ago. Love the idea of compounded interest even when you didn't top you account up. I put a few thousands in an account and hope for the thing to happen. In a few months, the bank sent me a letter notifying me of the account closure due to inactivity. Seems like the bank don't want you to be rich this way. They want it their way, that is for them to be rich. Still, if you keep topping it up, it should work.