Comment by freehorse

It sounds contradictory but it often does. When a part of the economy booms, it may make other parts of the economy less able to keep up because they cannot increase profitability at the same pace (so people will seek jobs with larger salaries, or investments will go different ways). Moreover, increase of demand can drive seeking cheaper sources of a product, which then overtakes the previous ones due to being cheaper (while before this increase due to regulations or lack of certain network/supply chain it may not have been possible or profitable enough to seek these sources).