I think the time given is very long because we all know that when you trade, to get a profit of more than 2%, there is no need to wait for up to 13 weeks, so when you have a lot of capital, then use it to trade better than investing with that method.
Trading is a high risk venture, you only make money if you have the skills, investing in a casino is easy, just put your money and wait for the return, but I agree, with less than 2% in 13 weeks, I think OP needs to re evaluate his investment, unless he is doing it for pure experiment only.
Saving your money in the bank could give you this rate, not monthly but in a yearly basis, but at least it's guaranteed and safer as bank have an insurance policy free for depositors.
or if you want to grow your assets in an instant way, you can go directly to a gambling place, but with a note that when you enter a gambling place, no one can guarantee an instant profit.
Not a good recommendation, if OP believes he can make money in gambling constantly then he would not choose to invest in a casino, that's against his principle based on the experiment he showed to us.