I couldn't imagine the stress of knowing what I know now and being sent back to when I was six years old. I'd be trapped with my parents.
I'd take the money. My wife is amazing, and we are very happy together, but a lot of things had to fall just right for us to end up together.
Red pill says restart at 6, not go back in time to when you where 6. I assume you will be 6 in the current time and have no future knowledge to convert into cash.
Blue pill: I would die of boredom if I had to go back to school for more than a couple of days.
Are the pills binary? Because I wouldn't want to rewind to far before either shacking up with, or maybe meeting, my girl. And all the fun things I would wish upon every iteration of myself that I'm doing now are things I'd started with in adulthood.
I'd only really be interested in taking about a third of a red pill, since that'd probably take me back to after I started most of these fun things.
If I'd be required to take whole pills, I'd take the blue one.