honestly, 600$ is not enough for you to invest in NEO, BTC or ETH. if you wanna earn much profit. with this fund, i suggest you invest in INS, XRP, Stellar, WPR and SXUT. these are good coins with cheap price, you can buy with huge quantity.
Some people have invest $1 in my token WSPU2 and I would say if they had invested $600 or more I had say it is too much.