Have you seen that in Vietnam you can now pay for everyday purchases directly from a non-custodial
Trust Wallet? Though, I've read the website of the platform providing the technology behind this system, and it gave me the impression that it is only about purchases using stablecoins, rather than using actual cryptocurrencies for payments. Still, it is a very important step. After all, in the worst case, any cryptocurrency can be exchanged for stablecoins without unnecessary bureaucracy.
My first time hearing this news..
From my own reasoning why they solely limited
To stable coin could be as the cause of volatility in the altcoin market.
And Yes, there are possibilities for expanding their payments methods if they have understood the system very well and can accept the risks associated with the altcoin market, not also limited to altcoin but I think they would include Bitcoin in time to come so they are just doing to start giving their customers impression that they accept cryptocurrency at the main time.