It’s a briefcase full of cash.
I’m pretty sure you could just say “It’s tax free” or even double the amount to $2 million and it wouldn’t really change which people would do it and which wouldn’t.
I’d do it, as long as I was really convinced that the only danger was mental, not physical.
Not OP, but there is some stuff. One big example is qualia. How does matter give rise to actual feelings, experiences of things? This isn’t something we can measure directly and it actually seems like it won’t be something we ever can measure. Might also be able to use something like “what was there before the big bang?” and that kind of thing.
Of course, the fact that science can’t explain something doesn’t really justify falling back on magic as an explanation though. Some stuff just may not have an answer.