DAI is not scalable. See https://medium.com/@hasufly/maker-dai-stable-but-not-scalable-3107ba730484 https://medium.com/@hasufly/maker-dai-stable-but-not-scalabl

DAI is not scalable. See https://medium.com/@hasufly/maker-dai-stable-but-not-scalable-3107ba730484 https://medium.com/@hasufly/maker-dai-stable-but-not-scalabl... for a detailed explanation as to why. Tldr: the supply of DAI is bounded by the demand for a particular kind of liquidity, which doesn't scale with demand for DAI.