This is made possible through increased liquidity in crypto markets. Specifically, the movement towards decentralized exchanges for crypto to crypto transactions. As this continues to progress, interesting financial innovations like MakerDAO will be become more and more sustainable. One of the primary caveats of doing business in crypto-currency is the fluctuating value.
Imagine holding a real decentralized crypto-currency that is pegged to the USD. That will open many doors for commerce, and decrease transaction costs. The ability to swap this token back and forth using atomic swaps will allow people to remain in crypto longer, without exposure to crypto price swings.
Once this happens, people will be able to keep a portion of their net worth within crypto currency indefinitely. A stable coin is what the market needs to move forward, and it will happen within the next few years.