You will need a lot of Bitcoin. Because you will never know what can happen in the future. The value is impossible to predict and that is the problem.
You will never know what the price will be, so sometimes you are rich and sometimes you have no money and that is not good.
I think the Bitcoin's price will rise sooner or later for sure. So holdinf bitcoins couldn't be but a profitable idea in my opinion.
You mean to say that holding for long will not be profitable or holding at a moment will not be profitable? If you are talking about long term then I think yes holding too long cannot be profitable as you never know what would be the value in future.