Don’t expect the economy to crash in 2019, but be prepared for a possible recession.
Plenty of people are asking about the chance of a crash, which I interpret as a pretty severe recession, like 2008-09. The primary trigger of a full-blown crash would be a financial crisis, when many companies, consumers and other entities have borrowed short to fund long-term assets which start looking dodgy. I don’t think that’s in the cards.
The stock market has risen for the last three years, sparking some worries. Most of the time, stock prices are a response to changes in the economy, though occasionally stock prices can influence the overall economy. The market is not so overblown now that it will drag an other-wise healthy economy into a crash, though it would certainly fall if some other cause triggered a recession.
As for housing, but we are not at all overbuilding relative to underlying needs driven by population growth and obsolescence of older properties. A recession could push prices down in the regions that are hardest hit, but a housing collapse will not be an independent cause of recession.