I think people know how to pick the right currency in their investment then the fear of their profit will be very sure. But here people see that many people accept Bitcoin completely for their investment. It is seen that there are some more coins for investment, It is possible to profit from them also.
Unfortunately accepting bitcoin does not spreaded that much in the marketplace. If I am whale or giant business man i will accept to use the product and services for bitcoin. Lets see what facebook will do after they launch their own coin soon.
When you invest on the bitcoin please do not convert it to fiat and keep show the demand for the bitcoin then you will find the growth for sure.