WITH OPTIONS: I can use a long straddle, so I don't care if it goes up or down, I just need a strong movement, and the probability of that is near 100%.
The problem is you won't know whether they will be a strong movement or not beforehand unless you are insider trading which is illegal. And by the time when you do, the price of the options would've already become very expensive. Plus you won't know how strong the movement of the underlying is going to be. If the movement does not happen to be very strong, straddle is VERY expensive and will lose value fast.
Buying straddle is like buying the lottery hoping one day you will hit the jackpot. And trust me, strong movement like these will only come once in a blue moon and majority of the time you will be buying straddles for nothing unless it is an extremely volatile stock to begin with but then in that case, the price of the straddle would've been already adjusted to reflect the volatility.

