That's what companies thought about manufacturing in China. But that was before they found out the costs of corruption and loss of trade secrets. If you're a fantastically succesfuly European company, what's to stop Trump (or any future president) just deciding you're too big and need to be sold to "an american investor"?
It is high time for companies and banks to invest only where democracy thrives because when you invest where it doesn't, your investment simply ends up being controlled by gangsters. This might benefit you for a while. But eventually, it won't.