How is 0.3 BTC possible with alt trading without any investment? I don't think that's possible.
That is really impossible if you are going to earn 0.3 btc in alt coin trading and how you are going to earn and buy alt coins.
If you don't have enough money for investment. In trading, you need to have capital so that you can trade.
But if you don't have enough capital you can just work for bitcoin and the payment you will , will be the one that will be used for capital of trading.