If you really want to earn ETH and BTC you need to work hard, you can do a FAUCET, but i think it will really take a while to gain a profit there because it only gives a small amount value and its not really worth to spend time on it (i've done it). Another one is join airdrop, incoming projects had this kind of things to promote their project, Also join bounty, Be sure to research everything before spending all of your time there !