With that amount of investment you have only 2 choices to make either you go for altcoin investment or else try your luck in gambling and if you are lucky then you can double your investment even in a single day so you can choose according to the risk that you can afford to take.
There's no only 2 choices many option you can try but some of them not very efficient with 25$, you can minning, gambling, invest on HYIP/casino site, Trading, Lending, Make a website and put your efforts in there, etc. you'll able to earn but not that much consider you only have 25$.