and they continuously keep repeating (specially before the halving) that miners will quit because it is not profitable and bitcoin will crash, burn, die....
meanwhile we keep seeing the hashrate going up
We need to prepare yourself for another wave of grumbling in 2020, when the next halving will hit us.
I wonder if by that time price of BTC will be so high to warrant lower mining rewards.
This is a wrong calculation if they use the price just now. But if it is calculated as how the price went up then it might be correct.
There is never correct price of BTC when you exchange Bitcoin to fiat. The 'correct value' you are talking about might be correct now.
But it will change in the next 2 or 5 years for sure. Articles like this are not trying to be ultimate source or knowledge anyway.