You can still trade with that number. If you have less trading experience or this is your first time, please prefer long-term trading as bitcoin is your choice of coin. You can still buy some $50 worth of btc today while it was at a low price and then wait to pump for a while. You can re-buywith these when you have income. And, be a bitmex swing trader or do some margin trading. FYI that it was kind of complicated than the normal btc trading so you've got to make an effort to expand your knowledge of it before moving into that kind of trading.
I do not like this idea, just the fees alone of converting your money from bitcoin to another coin are going to eat whatever profits you may have and that is assuming that you have a way to make money in the markets which is not true for the majority of the traders, it is better to get more money and use whatever free time that you have to improve your skills as a trader and once you do you will obtain a lot more money than whatever you could get with your 50 dollars.