Hi..guys
I am a btc miner for almost a year. I think it is impossible to get 1 BTC a month. I want to know wheter is there anyone who goal to get 1 BTC a month. Thanks for your response.

Your poll asks "without referral" "without investment". Getting 1 BTC per month through referral... is going to be impossible for most everyone that is a lot of referrals. Also what are you referring them to?
On investment it depends if you have skills or something to sell really. Since posting in a mining forum.... normally it is with investment. Take 458 per month right now times 12 months is almost 5,500 usd per year. So no getting over 5k per year without any investment or something to sell... is going to be very hard.