In the long take this week, I revisit decentralized finance, providing both an overview and 2019 update. The meat of the writing is the following long-range predictions for the space in the next decade -- (1) the role of Fintech champions like Revolut and Robinhood as it relates to DeFi, (2) increasing systemic correlation and self-reference in the space, which requires emerging metrics for risk and transparency, and (3) the potential for national services like Social Security and student lending to run on DeFi infrastucture, (4) the promise of pulling real assets into DeFi smart contracts and earning staking rewards, and (5) continued importance of trying to bridge into Bitcoin. Here's to an outlandish 2020!