Buying and selling bitcoin is the best way to earn from it. Altcoin trading is risky but worth it as long as the prices do remain about certain limits. Again many altcoins are scam and thus people should use their judgement before investing in them. Then again its not possible to declare an altcoin to be scam every now and then. So its based on a bit of luck from your side as well.

As a newbie you should learn the basics of trading and prevent impulsive trading and panic trading.