A bitcoin miner in every device and in every hand (https://medium.com/@21dotco/a-bi...). Having spent over a year building out a Bitcoin micropayment platform, we quickly realized the limitations of running 'wallets' on mobile devices. This significantly scopes mobile applications and user experience and was a huge barrier to adoption. I strongly believe 21 has the opportunity to build the necessary technology to drive the adoption of Bitcoin as a truly decentralized identity and asset ownership ledger.