Yes, should be clear with clients how you are going to accept crypto so they know that you will be basing in the current market. But wondering if the OP pushed thru his crypto payment in his shop since he created this thread? Because when he posted this topic, the btc price was $14k at that time. And if he managed to implement what he was planning, and had few customers that paid btc, guess, the value right now of that btc is more than double. OP has not posted recently here.
https://www.quick-cheque.com/cheque-printing-software-indian-banks/