There are many things that you can do to earn cryptocurrency, but none of them are particularly easy. Some are downright not even profitable, and others are a waste of time.
Here are some activities that you can do for fun as a hobby in your spare time if you would like to experiment with earning some bitcoin, alt coins, and crypto for yourself.
1. Mining / CPU Mining / Cloud Mining
2. Staking Your Coins / Masternodes / Proof of Stake
3. Get friends to sign up with Referral Codes