"Of course, one day he might do something worse than break the china. One day he might blow up the house. That wouldn’t be so fun."

It's fun fun fun until someone loses an eye. 

Just what is the political analogy of going bankrupt? Because you know he's going to go there. Who will be the contractors that get stiffed, the shareholders financially decimated, the partners denied compensation? It won't be Mr Trump. It's not 'refreshing', it's terrifying. Think of the likely outcomes, if only just with the ROC/PRC boo-boo. Net win for the USA? mmmmm, no.

There's a big difference between conflict escalation in business, where there is a 'rule of law' environment to operate within, and geo-politics, where things are less defined. Being a 'Bluffer-in-Chief' might be an asset in business, but a really bad thing (review analysis of Cuban Missile Crisis) in politics. Taking the call (and actually setting it up in the first place) sent a very poor message to everyone who can hear.