DISCLAIMER: I currently own and mine 0xBitcoin, and am actively trading it. This is not financial advice. Solely analysis.

0xBitcoin (0xBTC) is the first mineable Ethereum token. It’s an ERC-20 token, but can only be minted by proof of work being sent to a smart contract. It has all of the same properties as Bitcoin: block rewards, proof of work issuance, 21 million cap. It also has all of the best properties of Ethereum: useful for Decentralized exchanges, faster to move, useable within Dapps. If you’re interested in learning more check out the white paper.