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