This achievement requires you to unlock a maximum bet of at least 500 and have at least 860 coins. The max bet of 500 is unlocked at level 9. (thanks Sashamorning)
After you unlock the max bet of 500 simply start at your min or max bet and after each spin raise or lower it before you spin again. Make sure all five bets are unique amounts.
You might be able to get this and:
at the same time by changing your theme and bet after each spin. (Cannot confirm)
If it doesn't pop keep trying maybe close and open. It may pop later. (Thanks eNaRGe)