1. You don't like your money anymore.
2. You've become a monk and sworn to a life of poverty.
3. You couldn't stand the thought of Sal and Dory having to pay for their own Florida vacations.
4. Your ex gave you a lot of money to invest for them.
5. Someone has a gun to your head telling you to click on the "BUY" button. (This one is not really a good reason to buy, more of an explanation if you already did)