After you get 1,000,000 in the banking part of the game, it would be cool if you could have the option of putting your money in a bond or something, and get a higher interest rate for keeping your money in longer, like, maybe a 6% interest rate for a ten minute bond, instead of 2 for 5. A stock market option could be cool too, where maybe you could invest in fishing, so the more you fish, the more money you get out of it.
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