Tech bubble boom / bust ........... year 2000.
Once the Covid pandemic settles down and more people get vaccinated, the economy will bounce back. With the bounce back will come a very pent-up demand for many things. With a return to "normalcy", I believe people will be in a somewhat celebratory mood. Remember ....................... many of this younger generation didn't endure the rationing of food, gasoline, all kinds of metals, silk, nylon, etc., "blacking-out" their home windows (to avoid bombing raids), security checks, and many other things like the folks who lived through WW II did. This whiney, spoiled generation only has had to go without travel and social events - like going to bars, sporting events, workplaces (even though many people can work remotely these days) - for 1 year. 1 year.
I look for many things to BOOM once we - more or less - put Covid in the rear-view mirror. Many of the sectors that are now lagging will once again trend upward. This is the very landscape my actively-managed funds like to prowl. They look for "dogs" with good balance sheets, distressed situations, companies with good management & wide "moats", etc. Consumer goods, cyclicals (an apt name), materials & other current "dogs" will once again rise. No denying the Faaang stocks though. We own them through our index funds and also in our actively-managed funds.
More and more people are in investment vehicles like 401-k's, IRA's (Roth or regular), 403-b, Keogh's, etc., so as more and more retirement money gets invested, I see the long-term trend for markets going up. Bonds, CD's, and MM funds all stink for yield - so what's left (for the avg. investor)?? REIT's that owned large amounts of office and shopping spaces are sunk - or sinking - as more companies and retail are going remote or online.
If Covid - or any of it's mutations and variants hang around, look for more remote working and online business ................................. and any companies that support those possibilities to flourish. Local food growing will be HUGE!! Less hands to handle and move food and so less contamination possibilities.