Which one is better?

Answer
Whichever one you can make a consistent profit at.

Stock vs Forex vs Futures: Which has the biggest changes?

I want to know which one changes the most so I can make the most money.

Sources, a lot of them please.

Answer
Well, both futures and forex are zero-sum meaning that you only make money when someone else loses it. Both those markets are dominated by institutions that hire serious talent. You are asking a complete neophyte question. What makes you think that you can beat me and people like me at futures or forex?

US Savings Bonds for you.