The biggest Stablecoin, Tether, is also struggling (https://coinmarketcap.com/currencies/tether/). Their 3 month trend is clearly downwards.
Not saying Tether is the bastion of trust but the data shows exact opposite of what you are implying.
I'm sceptical enough of Tether that my opinion isn't interesting, but the trending nature of the slip could easily turn out to be an early warning.
[0] https://fortune.com/2021/10/15/tether-crypto-stablecoin-fine...
[1] https://www.bloomberg.com/news/features/2021-10-07/crypto-my...
That aged well. Tether hit $0.9935 hours after this comment.
Now much smaller, and steadily down. Probably nothing but a definite change in their patterns