The best way to earn cryptocurrency is probably by mining and staking.
However, If you just want to play around there is a bunch of ways where you can simply claim crypto for free. 
So here are some of the best ways that I found, all tested by myself.

• 2Miners Crypto Mining with feeless Nano payouts.

• Coinbase Earn & Learn.
  

• Coinbase DAI stablecoin staking.

• Presearch Search Engine.

• Brave Browser Ads.

• Captcha Faucets.

• Watching videos on CryptoVision and JungleTV.

• Staking & dividend earning on ViteX DEX.

• Auto staking CAKE on PancakeSwap DEX.

• Staking on Exodus or Trust Wallet.

• Reddit r/Cryptocurrency MOONS.

• WeNano app (Pokemon GO type game).

•  Aircoins App (Pokemon GO type game).

• Writing articles on Publish0x, Steemit or Hive Blog.