one side. the amount is too small. where to invest it? on the other hand, people who bought Bitcoin in 2009 for a smaller amount, never regretted it)) if you guess such a coin, you can perfectly spend the rest of your life))

Well 50$ is very small amount for investing. I can't expect a real profit from such "investment". Maybe I will buy some good tokens which have a potential to grow up with time, but it will not help to buy a lot of them, because such tokens usually cost 1$ at least per token.

sorry but it is so low amount. 50...
you can try to take a part in bounty program

The transaction fee is not that high, only if you are sending it from an exchange. The coin that is worth being traded is Ethereum.

You said "invest" so i'm going to assume you're happy to hold the coins and you're not looking for a quick buck. In which case i'd most likely invest in Maidsafe coin (I mention it a lot in this forum but I really think it could change the internet). It's around $1 at the minute and its one for the future but if it takes off it could take off big

Try to find some coins/tokens which arent hyped yet and have solid projects technology.

In my opinion, join some airdrop program and attend some bounty program is the best choice. you didn't need to invest much money, what you need to do is just spend your time to gather information and try to follow the trend,
this will also bring huge return，if you are luck enough

Many people suggest super small alt coins (< 1$ or so). That can work, especially if you decide to go for the longing approach. I'd also suggest checking out Ripple.

My investment strategy is to diversified meaning putting investments in different cypto. If I have $50 right now I will put it in cheap altcoin like dent and bytecoin, these are very cheap coins with value under 1 dollar, but have a decent capitalization, I am not suggesting to invest in large cryto because the initial investment of $50 will just not give you a very small amount of income and hinder you from investing in many cryto as since the price is high, your $50 will just be able to get one or two cryto to invest into.

If i have $50  it's a small amount of money,But i will buy altcoins and hold them.