Can Europe Really Dump Its US Debt Holdings?

You buy US debt if they keep buying your products. If they impose tariffs and stop buying your products, there's no need for the dollar as a reserve currency, especially when it starts to gradually lose its value.
In fact, countries around the world, including Europe, have already started selling it. That's why the Swiss franc and commodity prices have been going up.
Very soon, DJT will realise that the world doesn't need the US and is the other way around. In fact, the world needs the US like it needs a hole in its head. By far the biggest thing the US exports to the world is inflation, by constantly printing fake paper. Pretty soon that paper won't be worth the ink thats writen on it.
The Japanese will have to start selling those treasuries to pay down that massive debt.
I think the chickens are finally coming home to roost.
Be careful what you wish for.

I think Europe should keep it the way it is and use it as a leverage over the USA.

dumping it it's like starting a nuclear war and nobody really wins. But the threat of using nukes is very effective.

buy Silver tomorrow....

USD is the king as long as Trump in power. Please don't mess with him. We have the most advance military