If I hold 1 or 2 btc for a long time, It will be surely profitable in the future or not???
I think it will be profitable. Most people buy bitcoin hoping to get more money out of it.
But if you think anything else: sell now and buy when bitcoin is cheaper.
holding some btc for a long time and trading with other some btc is also a good option...
Before you are trading you must have a strategy so you will know what you can do while you are trading and that would be perfect.
But it is hard to make any profit in the beginning and that is the problem.
yes it is true, it is difficult to earn advantage at the beginning, moreover if still very new in the trade.
a good way is, you try to be accompanied by your friend who is good in the trade. you will be notified when the right to buy the coin and you can make a profit. I myself the first time also did the same thing.