Do you buy 90% of your stock at 12-15p bidding up the price...

Do you buy 90% of your stock at 12-15p bidding up the price steadily to 20p to sell for a good profit or do you try to buy 90% of your stock at 6p to 7p and once the available on-market stock thins considerably pop the price to 20p quickly in a day or two? Probably after some excellent material news that has private investors and day traders scrambling to buy thinly available stock at market or gap up, selling to them for mega profits in to their demand.

Sell? Nahhh think I'll stick around on this one... just a hunch mind you......