In my investment strategy, I divided my funds into 2 parts. In long-term investment, I use 40% of my budget for the potential coin which is listed on top 10 CMC such as NEO, Eth and especially Bitcoin. For the remaining money, I use it for trading on the exchange. I will buy the alts at a low price and sell at a high price. In my spare time, I participate in some bounty campaigns to get profit.
You should be careful of buying alts, most are unproductive and just regular pump and dump coins which will leave you poorer than ever. Stick with the high volume alts like ethereum, ada and so on. Also I recommend using binance, they have the lowest fees and the highest amount of alts to choose from.