It won't be the same as an oil shock, dot-com bust, GFC, or COVID, but something will happen. 

- L**** Markets I've rented in since 1997: College Park, MD | Centreville, VA | Brooklyn, NY (Bed-Stuy) | NY, NY (Upper East Side, Upper West Side, Murray Hill)**** City Councils and Lease Types: (9 different leases over 25+ years)** City Council of New York (market rate lease (1 with and multiple without guarantors), 1 rent stabilized lease, and 1 unique govt. program in C-class neighborhood), ** Prince George's County, MD (market rate) ** Fairfax County, VA (market rate)**** Building Types: ** Non-combustible 8-unit and 10-unit (both built 1950s-ish) (walk ups), ** Semi-renovated former tenament building (1870s-ish 1 sink, bathtub was originally in kitchen, built wall around it)** Garden-style apartment (2000s walk-up, private porch), ** Luxury 100+ elevator (built 2012 with non-foodretail underneath + underground parking garage + 24 hour security, ** Luxury 100+ elevator (built 1990s with grocery store and retail underneath)** Unrenovated brownstone (1870s-ish walk-up) (It was Hoboken, NJ circa 1996, I was the illegal 3rd tenant for a couple months)

LA  Brush and that stuff is highly combustable. 

If the insulation is in decent shape and not covered by combustible insulation, and not terribly overloaded, it might last many more years.

(combustibles?). 

If a painter leaves the rags they stain with in a pile, they can spontaneously combust and cause it to catch fire.

For the past 30 years I rode that ride well (in spite of the dot com bust and mortgage crisis), and made a lot of money.

I've read a million threads where people hint at appreciation and everyone's hair spontaneously combusts and a lot of people start freaking out about not betting on appreciation and invest for cash flow.

A consequence of that is that you will have an increase in demand for air to support combustion, and an increase in exhaust.

@Samantha Klein,Please note that these products are for use with electric dryers only.Gas dryers emit products of combustion.