Yes you can make daily income from your investment. Always investing money into those coins which is having highest volume.
For example Take bitcoin as example Bitcoin daily fluctuation is about 200-300 USD as an average from it you can make passive income.
But it is highly risky as well because crypto market is bullish and bearish.
It seems to me that if you earn on the difference in the price of Bitcoin precisely today, then there is a huge risk of losing your future income if you sell not at the moment when you need it.