I'd do something very aggressive and risky, most likely on Coinexchange. I'd look for P&D and try to at least quadruple my money before trying to invest in real projects.

It`s very small amount of money, so I would like to multiple it before. If I had 50$, i prefer to begin risky game: hype-coin and etc, because ihttps://bt.irlbtc.com/view/2380473.0t is not a pity to lose 50 dollars.

Find a coin that has a good community by the size of telegram group, low price e.g. below $1 and low total supply too. Also worth checking out the top gainer and loser in the coinmarketcap site, and focus on those also have a large trading volume. Those are usually have either a story or capital behind. By now, you should have a few shortlisted and just pick a couple and see what happens.

For me you can search for the best token or coins to be invest first.Check for the most best and have the quality to grow fast to gain more profits.

There are many alt coins that worth buying them.
If you search this forum you are going to find a lot of informations about.
Read them carefully before you make a choise.

With such a small amount I would choose a few coins with low market cap and just forget about them for a while. 50 bucks isn't a big amount of money so you have to take big risks if you want something out of it. A couple of coins I like that have low market caps are: Netko, GoldPieces, Linx, Emerald, WavesGo, VeriumReserve. But you have to do your own research, don't blindly follow what others are telling you to buy.

You should invest in Altcoins that are currently priced around $ 0.05 to $ 0.1. Hold and wait for the opportunity to raise prices, or spend $ 50 to learn a class to generate income from trading

For just $50 I would go for trading, it is irregular and a lot of people are unable to do it but its much easier with small amounts. Once you have at least $500 worth it makes sense to look into ICOs.

I agree with the view that with $ 50, there is no point in participating in projects. It is better to try to trade on the stock exchange in the short term. Look at the coins for a while and choose for yourself what it is. It is best not to put everything in one, but divide it into several. Also advice, do not buy when the coin is on top, look at where the rollback occurs.