# USD1: Bitcoin’s Native Stablecoin In a groundbreaking milestone for the Bitcoin ecosystem, USD1 has emerged as the first native stablecoin integrated directly into Bitcoin’s mainnet. Launched by World Liberty Financial (WLFI), USD1 fills a critical void left by Tether (USDT), which recently discontinued its Omni layer support, leaving Bitcoin without a stablecoin until now. Backed by short-term U.S. Treasuries, USD1 offers unparalleled transparency through daily reserve checks and operates seamlessly within Bitcoin’s UTXO system, thanks to the innovative Bitcoin Thunderbolt architecture. This development not only restores stablecoin functionality to Bitcoin but also redefines its role as a platform for programmable money. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.nubit.org/usd1/usd1-bitcoins-native-stablecoin.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.