Approximately $50 billion of market cap was erased in just under a week in one of the more instructive blockchain experiments yet. Terra, a cryptocurrency network based around an algorithmic stablecoin called TerraUSD and its native token Luna, crashed to effectively zero from peak market caps of $40 billion and $20 billion, respectively.
The tl;dr: the crash is a cautionary tale for investors and regulators. For investors — both institutional and retail — it’s a reminder that there is no free lunch. The hook that attracted many to the ecosystem was the 20% yield the protocol was paying, marketed by the development team and exchanges as “stable.” The design of this project was clearly flawed from the beginning and at a minimum was significantly riskier than advertised.
What happened?
Unlike USDT or USDC, which are custodial stablecoins backed 1:1 by fiat dollars, UST was an algorithmic stablecoin. It approximated the value of a US dollar but did not hold US dollars. Instead, it pegged to LUNA via an algorithm.
The problem with any upward-sloping feedback loop is that it can also work in the opposite direction. When demand decreased for UST and individuals sold, the supply of LUNA increased and its price decreased. At a certain point, the price of LUNA decreased to where there simply wasn’t enough liquidity to provide an escape hatch for people looking to sell UST. The peg broke. The system collapsed.
The lesson:
Incentive structures that look too good to be true in financial engineering usually are. A 20% “stable” yield is not stable — it is a mechanism waiting to unwind. The collapse of Terra was not an indictment of blockchain technology broadly; it was an indictment of a poorly designed incentive structure that attracted capital it couldn’t structurally support.