Bro If you want to Earn 0.3 Bitcoins per week You have to work Full time For Bitcoins. You can Earn Bitcoins By Offering Services in the Forum...
he has no chance to earn 0.3 btc in 1 week without any investment and risk. 0.3 btc is almost 190$ and its too hard to earn this amount of money.
if you are very good in design, blog, making logos or anything like that and you are too lucky to get any good offer, you may earn that amount or more, but you need to try very hard and will be very lucky
anyway, good luck and happy earning
0.3 btc is not easy to earn from only a single source, but you can earn that amount if you go for trading and it will definitely help you in earning that amount weekly.