Bitcoin is volatile. That's the main issue. You can't say that about the dollar or euro.

Now imagine you get paid in bitcoin, save every month for a holiday or a high value purchase. When the time comes to make the purchase you find out that your savings are worth less than 10%. How does it feel using bitcoin?

I tried to use bitcoin(as a merchant) but due its volatility it makes no sense to use it(as merchant or buyer).

Its volatile because it is relatively new and not backed by a government. Market forces are having their way.It will stabilize