Yes, but why borrowers will borrow your money at 10% interest when they can borrow from the bank at 3% interest? (or whatever).
The point is that banks can lend money at 3% interest because banks are creating the money. They dont have to earn it, like you and me.There is no way you can compete with that. While banks have the power of creating money (through fractional reserve system) there is no way to compete with them, because its not a fair game.
Hugo