Just a basic thing you need to buy the altcoins as low as possible price then sell it if it gets higher...
I agree buying altcoins now is a good choice because they are getting cheap because of the huge price increase of bitcoin and we can make a huge profit in the future even though we just start with small amount because if the price of the bitcoin would drop down a little bit it will be good for altcoins because it will help them to increase their price higher than before.