The regulations about buying penny stocks

[Xanthia Alysha]

I am not sure if it is the same as other stocks, cause imagine you buy stocks with values less than 3 cents for $5k and it suddenly becomes 8 cents and guess what? you almost triple your money and such a things sounds to be more likely to happen for penny stocks.What do you think? Am I wrong? Are there some extra charges for buying those stocks?