even if you find an altcoin which price might double, you will only get $5.
buy/earn some more btc until you reach 0.4 then invest.
If he can't build 0.02 BTC up to 0.4, what makes you think he'll build 0.4 up to anything meaningful? Start at the bottom.
I don't understand what are you implying. I simply said that OP can get 0.4 (or maybe 0.2. high enough to be called "investment") by buying or earning thru selling service/signature campaign faster than by investing on a dice site bankroll or trading.
also I don't know why people assumed that I was talking about ponzis. I wouldn't describe ponzis as waste of time because a ponzi are very high-risk and fast. and obviously I wouldn't recommend anyone to use them.