One thing to say mining bitcoin consumes a large amount of electricity and it would take lots of equipment to manned the mining. There should be a development in making the cost of bitcoin lower; given that lower mining cost could yield a higher profit. However, it matters on trading and exchanges.
Surely bitcoin extraction is very expensive. You have to invest in machinery costs and monthly electricity bills. I have a friend he has a lot of machines to exploit bitcoin. About 3-4 years ago he gained a lot of profit from mining. But lately his profit has been small because bitcoin is now very difficult to exploit and the cost of electricity is rising