When faced with games of chance, lotteries or wagers, you would say:

I never gamble, even if there's no risk. (No gambling)

Only if it's free to enter, or I won't lose money (No risk)

I don't mind losing a bit of money if I could win a lot more (Low risk)

There's no reward without risk (Average)

I'm willing to risk it if the winnings are high enough (High risk)

I'm going all in! (Very high risk)

I can stop whenever I want. (Gambling addiction)