Well, it is all relative. Elon is a multi multi billionaire, so makes no sense that he can't quickly raise a few mil to cover legal settlements like that. Not to mention credit lines.
While I am mostly invested, I actually do keep a fair bit of cash on hand (relatively speaking) not just to cover unseen cash needs, but I am also an opportunist in the markets. I like to do swing trades (or grab some good deals for longer term investment). Kind of hard these days, though, with the markets still near tops. But there are always individual stocks that can be played.
It is going to be an interesting fall again, not just because of China and Trump's woes, but also Brexit and what will happen there. I just want to be ready...