Is There a Bubble in the Economy?

Munger: "Strange things have happened and they're very confusing to the economics profession in fact if you're not confused you probably don't understand it very well" He says Berkshire has a business model of owning over 70 non-financial unrelated businesses bricks and chocolate for example which is almost universally not worked well in the past 100 years of American business. The question is are the probability the probabilities do not seem likely to be favorable that their successors will be able to have it continue to work nearly as well so that is my question.