500,000 shares @ 0.12 = $ 60K purchase

450,000 shares @ 0.15(average price sold) = $ 67.5K sold, ROI 12.5%, no risk dollars on the table

50,000 shares sold @ 0.15= $ 7.5k sold, ROI doubles to 25%

I'll put together the list of risks I had posted, it'll take a while and I didn't see a need to go there but you asked for it