You know, it's just the obvious end outcome of capitalism. Capitalism only works as long as there is an expansion, as long as it builds on itself. Think of it like a house of cards, not in the wobbly sense but that sooner or later you run out of cards (there's only so many resources translated to money out there) and then the only way you can keep building is if you knock the house down and start building from the bottom up again.
Thus, Capitalism will unavoidably come with periodical recessions in which the whole house of cards comes tumbling down and we all have to start rebuilding from the very bottom up.
Kinda like a roller coaster ride.