I want serious advice this is right time to buy some coins or not?
easy. when you decide to not buy and price heads toward moon, you lost nothing but feel like an idiot. (that you are)
when you decide to buy and price tanks all you lose is your investment. so make that a figure and kiss it good-bye.
if it does´t work out. ok, there was a chance. but if bitcoin rockets on steroids through the house of card stack world of finance, you may feel sour to have come that close to buying some, but then hesitated because of the price. this may be a one shot in a lifetime chance. throw at least some @it.