One of the basic strategies that you can look into is buying at the right time. It is natural to buy cheap when there’s a surplus of assets lying around. The challenge is to know when the supply is greatly ahead of the demand. Profit can be easily made with the gap between the cheap purchase an expensive sell. Another ideal way to purchase coins is at the time when ICOs (Initial Coin Offering) is introduced.
Always pay attention to Bitcoin. Most altcoins (every cryptocurrency except Bitcoin) are pegged more closely to Bitcoin than Asian currencies were to the USD during the Asian Financial Crisis. If Bitcoin price pump drastically, altcoins price can go down as people try to exit altcoins to ride the BTC profits; inversely, if Bitcoin prices dump drastically, altcoin prices can go down, too, as people exit altcoins to exchange back into fiat. The best times for altcoin growth appear when Bitcoin shows organic growth or decline, or remains stagnant in price.