If a thing can't go on forever, it will eventually stop.
Psychiatrist to patient: Maybe you don't have a complex. Maybe you are inferior.
Consumer: A person who is capable of choosing a president but incapable of choosing a bicycle without help from a government agency.
Things that can't go on forever... don't.
Whatever may be the distribution of uncertainty among economists, the public only gets to hear from those who have certain opinions.
Trends that can't continue, won't.