It is difficult to estimate a normal price of a cryptocurrency that depends on the free play of supply and demand, and the reliability and ease of making payments. However, an increase in value can be expected, since each time it is corrected and therefore offers greater confidence to the market; consequently, generate more buyers of this currency and therefore greater value.
I choose above 15k because bitcoin possibly may reach to that price this year. That's true it is hard to speculate the price due to btc may swing fast to increase or going lower its value. All is possible to happen let's check the price what may hit this year.