haha! no course not on the investment side in regards to credit cards, We just have them set up on auto payments and get 5% on fuel so we're always surprised at the amount of money we make at the end of the year for doing nothing, it's a nice bonus.

But of course that only works if you are very disciplined and we are, we don't spend a penny unless it's something we need! lol.

Also we like them for traveling, ever tried to travel without them? It's dang near impossible to reserve anything without them.
But no I'm not talking about investments lol. just free money.