Time to get more conservative with your investments. Just moved my retirement accounts from 100% in a 2050 lifecycle fund to 75% in a 2030 lifecycle fund and 25% in just government bonds. Not all investment vehicles have a "lifecycle" fund but its intent is to be appropriately conservative for a target date. As the date grows closer, the fund gets more conservative in order to lessen the risk of sudden swings right b…
I'm 40% in cash, 50% in S&P and 10% in small-cap. The last few months, all of my contributions have been going into cash, so that when the fall happens, I can hopefully scoop up a deal.
Don't take my word for it. Go over to portfolio visualizer and compare your allocation to a simple 1 fund S&P 500 at 100%, compare over 30 years and draw your own conclusions. I'm not recommending a 1 fund portfolio, btw, but that you do that as a basis for comparison.
As far as cash goes, have 3-6 months of expenses available not in a brokerage but in a bank account, checking, or actual cash.
Waiting to "scoop up a deal" is a shitty strategy.