Market price in some cases are unpredictable because I have heard of some one buying a coin in a certain rate, but just for sometime it get reduce to a lower rate,so market price is unpredictable
We are talking about bitcoin here in this thread, so I am not sure why you consider mentioning "a coin" as if you were on topic, which you are being vague and you might be referring to shitcoins rather than bitcoin, and if you were referring to bitcoin, then why didn't you just say bitcoin?
Maybe you don't know the difference between bitcoin and shitcoins, and so you think that they are all the same thing?
Hopefully you can figure out how to learn about bitcoin first so that you don't get mislead into some crap and then start talking like you know about crypto when you don't even know what bitcoin is.