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.
If you are a miner you should know something like this before. Mining bitcoin should have a lot of capital besides the cost of electricity should be considered, so you will know the profit in the future you can get when you start.
Bitcoin reward mining is now smaller, while maintaining cost, electricity, and others are more expensive, I think mining will no longer be profitable in the future, you can see fewer mining sites than a few years ago, because currently people are more interested investing in altcoin, ico and trading