Buy altcoin which has just appeared on the market, and the price tag is very small but with a good idea of developers. And wait.

If I have 50 dollars I would buy neo,because potential is very big and price now cheap

If i had 50$ i would invest it in some promising ico which can bring you 10x or more. I think it is a good strategy to start make money.

I think it depends on you mate if what coin would you invest because if you rely on someone and you dont know what the result is, it will bothered you so if you invest just make sure that is yur decision not anyone or anybody you can research what coins must be invest or have potential in short term or long term investments.

If i have just $5, i would ensure that i participate in bounty campaign in order to earn more and then invest what i have earned either in ICO or on holding coins after listing. I also think the $50 that you have can also go a long way in trading. It is  a good amount to start with. It is not what anyone cannot afford to loose. The most import thing is that you research on whatever you intend to invest in. Most times, i consider the use case of the project.

Today, you can see a large number of ICO projects. It became so popular and fashionable that ICO decided to go all out. There should be more projects which offer long-term investments. Because only financial pyramides can tell that you'll immediately become a millionaire after investing.  The best way to profit from ICO is to invest into ideas which are already turned into projects. Have a look at the proect which is in my signature. I believe in this ICO.

I would buy a $ 50 low-cost perspective coin, so that it gave in the near future-a double profit.

The amount is so small that it confuses to determine whether to invest in nothing. But you can still invest in crypto because the price of coins in this crypto is very diverse. If I have $ 50 worth of money I will invest in ADA and Ripple in the long run. Then I will start to follow ICO so I can get more coins of different kinds. I am sure that with what I do it will open up opportunities for me to get great results.

My choice would be CND. It's not that this coin is in the top 100 but the graphs recently is not giving signs of slow down to the value of the coin itself

I think investing 50 bucks in the crypto market is a bad idea. This is too small a sum. I think you'd better treat your girlfriend a cocktail and forget about crypto forever. Although it is better to buy a hardware purse, if you want to learn crypto.