The basic game plan of any crypto trader would be to buy low and sell high. Understanding the price trends here takes up most of the effort as it sometimes gets unpredictable. Holding and trading BTC is much safer than relying on altcoins on the longer run. With alts, coins can go from zero to hero or even vice versa depending on the project, so it all comes down to your choice of choosing the right ones and making the right investments according to your budget.