MakerDAO (founded by CEO Rune Christensen) uses a different approach to stabilize DAI using its proprietary MKR token. It’s an interesting approach that closely follows fractional-reserve banking, in which a bank is only required to hold a fraction of its deposit liabilities. Except the collateral backing DAI isn’t the US dollar or any other fiat currency – it’s Ethereum and the whole system is built on blockchain technology and a smart contract ecosystem.