Let's say I'm sure that some index or stock will go up by 100% in near future (3 months, half a year, etc) but I don't know exactly when, but it will happen for sure. Before that move it can go down significantly. What strategy would you reccommend to take advantage of that upside move? I know I can just buy it and wait, but maybe there is any better approach using options / futures etc. to multiply gains?
