This is my personal suggestion, you should DYOR before investing in Cryptocurrency.
I would suggest you to divide $500 into four parts, it should be $100 into 3 and $200 into a single crypto . The top four Cryptocurrency that I would recommend to you is
1. Cardano - $100
2. BNB - $100
3. Litecoin - $100
4. Bitcoin - $200
You can change the amount as per your likes. I am not going to explain to you why I choose these cryptos, if you can check google, you will get your answer. I estimate within 2 to 3 months you should be easily able to make 2x of your investment. Remember as soon as you reach 2x individually or on the total balance of $500 (which ever you reach first) cash out.
All right, this is a quite interesting idea.
How about NEO? do you think NEO is still a good option to invest?
if have any doubt with your decision , you have to make deep observation and research in this coins.neo looks like pretty good, but we have to make sure with this to avoid wrong decision in future that will make us disappointed.