Future of Bitcoin Economics depends on mass adoption of Bitcoin. No body can predict accurately the true future of Bitcoin.
We can't predict what could be the future of bitcoin. To earn bitcoin they have many ways to do that trading, mining, investing, gambling and many more. Bitcoin prices is not stable so that prediction did not help to know when is the right time for buying and selling. From the other side for payment we can't predict to use it for other transaction so that no one will know what will be happen for the future of bitcoin.