Decentralized Finance, or “DeFi” for short, has taken the crypto and blockchain world by storm. However, its recent resurgence masks its roots in the bubble era of binance signals 2017. While everyone and their dog was doing an “Initial Coin Offering” or ICO, few companies saw the potential of blockchain far beyond a quick gain in price. These pioneers envisioned a world where financial applications from trading to savings to banking to insurance would all be possible simply on the blockchain without any intermediaries.
To understand the potential of this revolution, imagine if you had access to a savings account that yields 10% a year in USD but without a bank and practically no risk of funds. Imagine you can trade crop insurance with a farmer in Ghana sitting in your office in Tokyo. Imagine being able to be a marketmaker and earn fees as a percentage the likes of which every Citadel would want. Sounds too good to be true? It isn’t. This future is already here.
Stablecoins are frequently used in DeFi because they mimic traditional fiat currencies like USD. This is an important development because the history of crypto shows how volatile things are. Stablecoins like DAI are designed to track the value of USD with minor deviations even during strong bear markets, i.e. even if the price of crypto is crashing like the bear market of 2018-2020.
Lending protocols are an interesting development usually built on top of stablecoins. Imagine if you could lock up your assets worth a million dollars and then borrow against them in stablecoins. The protocol will automatically sell your assets if you don’t repay the loan when your collateral is no longer sufficient.
Automated market makers form the basis of the entire DeFi ecosystem. Without this, you’re stuck with the legacy financial system where you need to trust your broker or clearinghouse or an exchange. Automated market makers or AMMs for short let you trade one asset for another based on a reserve of both assets in its pools. Price discovery happens via external arbitrageurs. Liquidity is pooled based on other people’s assets and they get access to trading fees.