There's no actual fixed income when it comes to trading. Every profit that you can get with it are very dependent and flexible. It can be good for your first week but for the next week it can be bad or better. It really depends on how you are going to do buying and selling on the right time.
It's like saying "we can have a fixed income in trading on a regular basis" because "price movements are fixed every period we want" which is actually a weird thing to think. Bitcoin price moves a lot even sometimes we can only see a few movements per 24 hour monitoring. Therefore, the active bitcoin price fluctuation is really present all the time so no way even a professional trader can do a fixed income per fixed duration when dealing in bitcoin trades.
But here's the best thing to think, people can have a stable fixed profit when doing bitcoin trades for a long run and not on a fixed basis.
