Much more than you have now. The price is stuck and the exponential increase last year's end was a bubble that ha snot replicated itself recently and the consequent banning of exchanges in various countries and the subsequent loss of interest and mass-selling that came with it obviously didn't help.
Price growth goes in hand with the exponential growth of the usefullness of the network, i.e. increasing number of people using it. There is a clear trend showing that the adoption is taking place.
You can sure argue that BTC will no grow exponentionally or even fail, but if the fundamentals look right, then the price is only the result of the underlying function!
I'm not at all implying that bitcoin will fail,rather I'm merely informing about the current trend that has been on for that past few months. You can't simply quit your day job at this juncture because you assume it will be enough to last you into the future.