According to Christopher Chapman, an analyst at Citigroup Inc, that might not be a bubble problem or fork which would eventually kill bitcoin, but the staggering energy costs associated with mining of the digital gold.
As Citigroup report states, the price of bitcoin required for mining to stay profitable in 2022 stands at $300 000 according to the calculations, current growth trends, and electricity use. The amount of power consumed in the process of emission by that time would be enough for the whole Japan...
https://en.bitnovosti.com/2017/11/10/analyst-in-4-years-btc-mining-wont-be-profitable-anymore/This is a major issue . Without mining bitcoin will die eventually .
All the expenses and equipments used in mining the bitcoin is making it a very tacky task to handle . Many individual miners have come forward and complained about this that they don't get a proper reconginition and payment for mining . Mining does take alot of effort and time . That is one of the main reason many bitcoin miners are backing up BCH and taking higher transaction fees for bitcoin mining . This might lead to a huge problem in the near future. Bitcoin miners have earned a lot through mining before but due to the limited amount of bitcoin production and all the tacky methods they are shifting their focus into something that is easy .
His analysis is incorrect. Mining profits are diluted as more miners enter the market. If miners are complaining about their lack of profits, it's because there are too many of them competing for the same block reward and transaction fee resources.
It's a tough world, mining booms and busts are nothing new. They will simply need to shutdown and take the loss so that mining becomes more concentrated and profitable to the remaining miners.