$50 dollars isnt a lot but you are definitely better off investing it in cryptos than anything else. $50 dollars isnt a lot of money so you can definitely take some more risks. I would recommend you to find a good altcoin and holding those. Otherwise, there isnt a lot of other things that will allow you to 10x your money.
As mentioned $50 doesn't look to be very big, but this has got a value to give a good earning. It's good to invest into an altcoin which has the potential to give profit in multiples. Or else as the price rally is continuing since a few days buy bitcoin for the $50 and hold. You might be benefitted.