You get a million dollars, but there is a catch: whenever you spend any of it, there is a chance that a random person nearby turns into an evil ninja and tries to kill you.
Would you agree to that?
Yeah, I would. I could do a lot of good things with a million dollars. I'd just have to plan to only spend it once and be ready when I do (I even know how I'd spend it to achieve a greater outcome over time).
I won't lie and say there isn't a part of me that wouldn't actually be excited for the moment that I did. I've always enjoyed fighting but I never fight, because while I really like it, I really dislike hurting people, so the few sparring matches I've been in over the years I always used "gentle methods" that don't involve actually hitting (such as grabbing one arm and sweeping a leg while leading them to the ground with my other hand, which ends up with them lying on their backs but unharmed with a look of "wait, how'd I get here?"). But there's a part of me that hungers for a reason to go all out. It's weird.
Of course, if the person turned ninja didn't get to turn back into that person in an unharmed state, probably not. Money is just a means to and end and I don't value it enough to hurt anyone for.