If we see history. We can elaborate future of bitcoin with making calculations as Bitcoin is directly proportionate to time. As time going price of bitcoin is going high day by day. Also we have noticed halving. which reduces price of reward for block mining.
All consideration takes results as Bitcoin have great future and as time laps bitcoin will become more valuable.
I may find it hard to predict a the future, but fact is that you are right to some extent. Miners the key in the bitcoin network have been able to mine, this is only possible if they are ready to mine for a decent price to cover the cost. So far they have always been able to earn with their rigs, which means the price is indeed going up vs halvings vs difficulty.
And if this trend keeps up we can expect a much higher value in 2020.