If I had to pick street smarts is more essential to survive in this world. But that's just my opinion.
How about you guys?
Based on my personal experience and that of my family members', I'm going to say book smarts. I'll provide you with some examples below.
My parents have two children. My brother and I. I'm the book smart one. My brother is the street smart one.
I lead a pretty comfortable middle class existence in a suburb of Boston. My brother lives with our mother and mooches off of her and our father as well as me. He wastes whatever money he earns or borrows by gambling, drinking, drugging and partying.
Street smarts will generally not make you money, at least not in a legal and sustainable way. Book smarts won't necessarily either, but the odds are higher. It also depends on the extent of one's intelligence and the type of intelligence one has and how to monetize on that.
Personally, I have a high IQ and tested in the 95th percentile in verbal intelligence, however that's not the easiest type of intelligence to make money off of. If I had that type of intelligence in STEM, I'd probably be making $250k+/year. I made low 6 figures but I'll likely never make as much as that, outside of an inheritance.
I have a cousin who's really gifted intellectually and was making $250k right out of college. She's now a multimillionaire and her husband is even wealthier. So type of intelligence is key. But the bottom line is that book smarts are more likely to lead to legal avenues of success than street smarts.