Now we see why the USA moving towards crypto and they created new dollar the USDC and USDT and other stablecoins to make sure people have a lot ways to adobt dollar.
If eur and gbp will be out of the pictuere then imagine dollar purache power..... it's like 1000000% value.
You better stack up the dollars

dollar is now like ico you get in early
Dollars seem to be stronger and more stable than other currencies, but it is also losing value. The purchasing power of the dollar has decreased over the years. I don't know how you got the information that the EU is going to war. Maybe you are considering Putin's threats targeted at stopping NATO from permitting Ukraine to use long-range missiles. If the EU go to war, it will affect the US economy negatively, which might also lead to a decline in the value of the dollar.
Stablecoin enables traditional currencies to stabilize.
Stablecoin is just like an online or Blockchain fiat that has the same value as the physical currency. The value of the physical fiat will reflect in such stablecoin. Stablecoin decreases or value increases just the physical fiat version. So having a stablecoin wouldn't contribute to the stability of any traditional currency.