Trading is not a fixed income, you can't earn 10% daily. Some time you would gain some profit, may be 10% or more and some time you wouldn't which is quite normal. Profit and loss also depend on market situation.
Yes, when you decide to become a trader, you must remember that now, the income will be not stable. Today, you can make even 20-30% profit, and tomorrow, the prices of your tokens can fall.
Earning consistent profits out of the markets is something that everyone wants but almost anyone gets, and it is not really difficult to understand why that is the case, just look at the market of cryptocurrencies and the great volatility that it has that makes it almost impossible for anyone regardless of their skill to obtain profits in such a consistent way.