Clickbait title. This is a simulation of an unexpected event and IMO meant to dissuade the public from digital currency.
On the other hand, sure, it sounds scary. Which is a little strange. It's not obvious that establishing a financial "safe haven" should automatically inspire fear. To offset this hypothetical band run, they could beef up whatever deposit insurance EU bank depositors have. Or if there is solid EU-wide deposit insurance already then ... of course then we could ask an obvious follow-up question about the premise of the article.
*By "rational" here I mean to imply some degree of real-world financial literacy.
Did you read the article?
The reason to move to ECB would be for ECB garanteed deposits, which many could find safer than their local bank
> Flight to safety would see 13 banks out of cash