If a thing can't go on forever, it will eventually stop.
Trends that can't continue, won't.
Consumer: A person who is capable of choosing a president but incapable of choosing a bicycle without help from a government agency.
If something cannot go on for ever, it will stop
Whatever may be the distribution of uncertainty among economists, the public only gets to hear from those who have certain opinions.
If you asked a sample of Americans "What is the temperature of Mars?" about 8% would say they don't know.