You can buy a little nem and ripple. These coins are very promising. Especially I prefer nem. They should show very good growth.

As I heard now binance token has perspective for speculation. So I would buy it now

50$ is a relatively small amount but i would recommend splitting in coins that cost 5$ or less and try trading to try and make your 50 into 100 or more. Just study the market and try to predict what coins will rise in price.

With this small amount it is very hard to buy some good coin but we can still buy good altcoin with this amount of $50 Like Dogecoin is good to buy with amount it is easy to check the market for our investment amount. Bitcoin is very difficult for me to buy now a days as i have purchase some portion of Ethereum because the market value is good and it is helpful for me to invest in the crypto market for now the future is bright once i get the profit in this market then i will come to the bitcoin as well.

I like to invest it on either ethereum or ripple because they are said to be successful in the next years and investing in them is a must for me because i wanted to have that huge money if ever. $50 is a small bill but that money can be worth huge if those altcoins that you have invested in became popular. Ripple is much cheaper that ethereum so i will have much more quantity if i invested in them rather than ethereum because they are getting kinda expensive but still good for inveating in them. Just both of them are good but i think i will invest fully in ripple because if the lower price.

I kind agree with your idea because $50 including a small capital dude? the profit will be little if you invest in bitcoin. maybe gambling can double your money faster than invest in bitcoin. but it is very risky or you can try to altcoins trading. the price changes are very volatile and you can profit repeatedly quickly. if you want to be safe add your capital and invest in bitcoin

Agree that $50 is funny money, but anyway if you will have more than $50 just take top10 or top20 coins and buy them proportionally

I will invest in altcoin whose price is still cheap, because the profits will be very large if the price of altcoin is rising, compared to investing in bitcoin whose price is very expensive (my advice is better you invest in XVG or AMM).

50usd is too small for investment. If you want to feel the profit make it atleast 500usd. But for the sake of answering your question. I would invest that 50usd in one coin and that is BTC. You can also spread your investment in small but fast moving coins like Stellar, and XRP.
Take down your exchange site password. And leave it. Go back after 5months. You should see a 4x to 10x profit.