BitPay is now formally accepting stablecoins for payment, but not the one which is by far the most widely used
Source: https://cointelegraph.com/news/bitpay-launches-support-for-three-usd-stablecoins-but-not-tether
Bitpay Launches Support For Three USD Stablecoins — But Not Tether
December 11, 2019
CoinTelegraph