It should be noted that the USDT was used, the transaction of which was carried out between divisions of Hyundai in 2 countries (USA and Mexico).
I guess this could be the start of a trend, although we love to see Bitcoin being accepted like what Tesla and Musk did, before suddenly made a U-turn and stop.
Trends change. Stablecoins are all the rage now.

But now, it could be that stablecoins could be the one for now. So I guess there is nothing wrong with that. And maybe Hyundai in the future will accept it as payment not just internal transfers.
It depends entirely on the regulator. Any company, even one as big as Hyundai, is subject to them and can't simply make
bitcoin USDT a means of purchasing their cars.
What are your thoughts? Will Hyundai or any other big business will accept crypto or stablecoins as payment schemes?
Only with regulator approval. Until then, crypto-enthusiasts can only dream (about purchasing a new car directly from the manufacturer for crypto).