Ways to earn crypto-currencies (Bitcoins, Ethereum or Dogecoins) you can
1) Mine them using your own hardware.
2) Use Cloud Mining
3) Use Faucets ( Here is a list of trusted faucets that you can use to accumulate bitcoins, dogecoins and Ethereum )
Register on these sites for free and start collecting bitcoins but before you do that make wallets for the crypto-currencies on the following sites.
Dogecoin Wallet HERE
Bitcoin and Ethereum Wallet HERE
Why is it important to create a wallet first ?
It is important to create a wallet because all the registration and redemption on the faucets requires you to enter a valid bitcoin,ethereum and dogecoins wallet addresses. So before you register on these faucets register on coinbase and dogechain to create wallet addresses (Super Important)
Now REGISTER ON THESE SITES FOR FREE