I suppose, that BTC isn`t the best choice to invest, cause you need to wait before its price gets to the moon. I think, that it`s better to invest in some ICOs, cause they can make profits faster than Bitcoin. But they need must be really good. For example - TraceTo. It`s a decentralized KYC network. It uses SmartContract to identify. It likely used by companies, cause they need to know, with who they make deals. This project is developed by crew with many years of experience. I think, that these reasons are recipe for succes, and you can make earnings
The amount of money is directly linked to the people's own decissions. Some people have great amount of money while some others are only playing in exchanges with couple of bucks ($100). Each people will have their own decissions to invest in bitcoin.