where i can invest my btc and i can get a good profit ...with minimum risk? 
You can invest into gambling sites, obviously suggesting this because you are making this thread in gambling section. The best ones I have personally invested are - bitdice.me , its easy and instant payments. Other than that you can invest in crypto-games though I never did.and if is not a secret could you tell me do you have a good profit from bitdice.me and how much time the site is running ?