Blue, easy. A 6 years old me can't do much even with my current knowledge, and i have to live through a childhood with my current world view and a slightly abusive father. Even if my goal is to redo everything it will take years for me to even have people taking me seriously, or have the "requirement" to set things up, i'll be stuck in a child body with no one listening, that's a nightmare.

10 millions though, i can set aside 50k to be used in the near future, pay off my mortgages, and the rest invest in a low risk profile and live off the rest of my life from dividends, and perhaps set up businesses in that actually reward blue collar worker.