You should never expect to get rich through bitcoin or any emerging technology. It is always important to be alert to anything that sounds too good to be true, or is against the fundamentals of economic law.
Bitcoin is a growing area of innovation, and there are opportunities and risks. Even so far, bitcoin has been growing at breakneck speed, but no one can guarantee that it will continue to grow. Any investment in bitcoin's time and resources requires entrepreneurship. There are many ways to make money from bitcoin, such as mining, speculation or new business. All of these methods are competitive and there is no guarantee of profit. Each person should make an appropriate assessment of the costs and risks involved in any such project.
Mining is the best choice if you have large amount of money to begin with as the ROI on antminer used to be about 3 to 4 months a few weeks back and it means that you will be able to multiply your initial investment by 4 within an year only condition is that you shouldn't takeout any penny from the invested amount as then the rate of growth will become much more less. And in India the import of asic chips is now banned so it means I am no longer able to mine bitcoins or any cryptocurrency now only ethereum and other gpu mineable coins are left to mine now, but recently bitmain announced asic to mine ethereum also so now it would be much more difficult to mine ether, now I am thinking to shift towards Monero as its forked to be asic resistant.