How can I make minimum of 0.3btc in a month without trading and gambling?
As I've heard bad experience with both, but still need to make money
Try to join some campaign here in bitcointalk and create many accounts. Join your accounts to different campaign and use only one wallet or it depends to you. You need to exert more effort and time in order for you to earn a fair amount of bitcoin you want in a month. Also, be patient. You cant have money in an easy way.