Tether traded at 99.8 cents on Coinbase overnight. Kraken showed 99.83. Bitfinex got dragged with them. The peg is back already, but what can we learn from this?
A stablecoin is a promise that one unit is always worth one dollar. The promise is collateralized by Treasuries, commercial paper, and the willingness of an arbitrage desk to buy below par when the spread opens. The collateral works most of the time. The arbitrage works most of the time. But what is "most" of the time worth, especially when the thing your pegged to is already losing value every day?
Bitcoin made no such promise. The protocol does not target a price. It targets a supply. It produces a block every ten minutes whether the dollar is 1.00 or 0.97 or 1.04 against another currency. The chain has no peg to defend.
Stablecoins stabilize against the dollar. They do not stabilize against the conditions that move the dollar.
When the conditions move hard enough, the peg slips, the arbitrage opens, the spread closes, and the chart looks normal again two hours later. The thing the spread was telling you about the system underneath is the part you are supposed to remember.
Bitcoin does not chase a price. 1 BTC = 1 BTC always.















