I think the conventional wisdom is “no”. Cash is king and if you have a legit emergency you want that stability from basic savings.
For me, I work for a company in n NASDAQ (big fucking deal). If the overall market takes a shit both my investments AND my job will be at risk. Liquid emergency savings cover that possibility in a way that stonks and ETFs can’t. OFC savings rates kinda suck so there’s sort of a loss there too.