You learn finance and you create a structured product that put your risk to 0 and you earn money like you were a bank letting money to people.
How to do it : Choose carefully an option and a bond that are 100% correlated, I don't want to go in any details here but I don't think it's worth it for 2 month because you always have an entry fee and an exit fee.
To give you a ballpark % with this, you can have 10% returns in 5 years pretty easily, which is less than 2% a year because your money is blocked (so 2% raw and a bit less in compound). Nobody does this, because once you know finance, the minimum "required" is around 7% a year with, of course, a risk. (Why 7%, because the S&P500 grows that much every year, so it's not really a challenge to put your money on it and wait, the challenge is earning the same as S&P500 with a much lesser risk)