1.Investing
2.Trading
3.Gambling
But OP needs to have a strong will and control his emotion. With $600, it can be a good start to invest first with bitcoin if you still don't have it, buy it. Next to practice trading and when these two click for you, enjoy gambling with the profit you made not with the capital you have.
With $ 600, I think investing in bitcoin is a safe choice. If you want to trade, I think trading is a risky choice because of the very high price movements and also need sufficient trading skills. If you want to invest in altcoin, I think the top 10 coinmarketcap is a pretty safe choice because it has large liquidity and transactions
That would suffice you to profit and make out of that amount, you don't even have to monitor it daily if the coin you bought has liquidity.