it is true that bitcoin many are rich because of the object but, many are also poor and even poor because they spend a lot of money for the cost of reaching bitcoin. examples of miners who spend millions of dollars, indeed ceoat results but wasteful electricity and internet
Miners all made a big profit. difficulties in mining we see in this year only because of the more bitcoin users. Before who are set up and mined bitcoins they all are in good profit. But now mining bitcoin is very tough and investing on bitcoin mining machine is really not a good idea. If you invest that money in direct bitcoins, you can make a good profit in future.