There's a pump with NEO and a lot of rumors and good news are pumping with this coin. But if I were you, I'm going to buy ETH if you don't prefer to invest with bitcoin. And if you'll try to invest that $500 with bitcoin just for few days it can be $600 - $800. You just have to monitor the charts daily so that you can sell at the right time, I know bitcoin is quite expensive but if you'll buy some it will be worth it.