there is no other investment for me other than in bitcoin, I am very sure of bitcoin, because bitcoin gives a real change. and here gives a lot of profit opportunities.
How can you say that? There is a lot of other things that you can invest, that you can put your money into. Maybe you are saying this since Bitcoin is giving you good profits this last months of 2017 but Bitcoin is still risky than any other investments or assets. If you want to really earn a lot of money, you must not put your focus on one side.