There's no such thing as betting/investing/trading without risk. If there was such thing as no risk, then everyone would've put 90% of their funds in those and everyone would win. Even simply going to college is a risk.
True, everything comes with risk. I would say low-yield bonds are maybe the lowest in risk, maybe buying gold?
Anything else is going to have an inherent risk, hell a bus could hit you tomorrow, does that mean you'll stay indoors from now on?