This is exactly where the market can step in and guarantee prices. As an example, I sell items directly for Monero, priced in Monero, and I use the 365-day moving average to do so. As I sell her, my service is taking on the volatility. And for that risk, I use the 365 day moving average, which means that in fiat terms, sometimes my items are more expensive, and sometimes they are cheaper. Either way though, in Monero, my prices do not change rapidly.
Discussion
If Monero were as well adopted as bitcoin then Monero would have the same problem.
People want USD. All around the world. Everywhere I go, except Japan, people want dollars. That’s what the market wants no matter how much you wish it didn’t.
Seems like stability is actually what people want. Canadians don't mind having Canadian dollars. British people don't mind having British pounds. And Europeans don't mind having the Euro. But people in Egypt definitely want dollars because the Egyptian pound is a crap currency and inflates too quickly. Stability is something Bitcoin does not have because people don't price items in Sats. Because Bitcoin is too expensive and unreliable to be used as peer-to-peer digital cash.