It can, actually, deter opportunities. But the truth remains that no one can tell when an opportunity presents itself. If we know all these, that makes us humans omniscient then and all-knowing. We become God, and this isn't possible. No one sees a clear opportunity on legit issue and refuses to take it. I have missed a few opportunities too myself holding tokens I should've sold and the tokens never went back to the soared price. It went crashing like a stone left to fall from a 10-storey building.