The next halving is expected to take place by the year 2020, during which the price increase is an assured as the ongoing demand for bitcoin will generate the decreased supply an increase in value. So for the Op I would like to suggest him buy when the price seems low, during halving the price will be increasing same as the recent price wave.
That's a common myth. The halving does not decrease the supply. The supply is always increasing until it reaches 21 million. You assume that the demand will continue to increase, but that is not guaranteed.