Very high risk is more accurately linked to faster returns. The actual returns are offset by the cost when the risk is too high, in which the fast returns are met with equally fast losses.
Mersaphe is right however, that without taking any risk, your outcome is guaranteed to correspond to your inactivity, where you passively allow your fate to be determined by outside forces.
An uncalculated risk is pinning the tail on the donkey,none of the information but 1.
A calculated risk is all of the information but 1.