With only $50 you could also be a millionaire but need some patience. I was also started trading for crypto in Bittrex with just about $30 of Dogecoin deposited. I traded and traded more and more and continue it still. And now the value has now become almost $3000. But now if I keep the patience for another two years and traded intelligently it must be a Million.

If my only capital is 50 USD then I will continue to learn on this forum and save more.Yet I will research an ICO that just ended and was very successful , as soon as it get listed on an exchange.I buy $50.00 and leave it there for about a year or two. And It can appreciate about 1000%.

If i had $50 on my wallet at the moment, i wouldn't invest it in anything, that money is just dust, and you can not do anything with it.
Go outside, and buy yourself a sandwich and a coca cola, that is the only thing that you can do with $50 nowadays.

Because the $50 is not too much, I would invest in very very risky coin. Taking more risk can make more profit.

I will try to top the top 10 crypto currency based on coinmarketcap excluding bitcoin. That's the best thing to do if you're a newbie and do not know where you invest your money. At $ 50 your profit is too small but your capital is too small

SC- DGB-DOGE good option to buy.

This is not a very large amount, so you can risk and buy coins, which are now cheap, but promising. Pay attention to such coins as: XEM, ripple, 1 st.

You should try cardano. for a small budget, I think that would be very suitable. cardano has a very good potential this year

i would invest it in deeponion best privacy coin of 2018 !!!

Of course the amount is not large. I would invested $ 40 in the etherium, and the remaining ten have invested in espers. I think this coin can shoot as undervalued. Good luck in the trade.