If I was a trading insider then I would suggest my clients to research their own because for me values are far more important than price. I would never compromise my credibility just for the sake of profits and even if I knew some news that would push market price up for a particular coin then I would refrain from purchasing it and the reason is same as quoted above.
I agree with your point and opinion , just for the sake of price if we buy i may not sustain long , it requires more value than the price , as it goes long period that should sustain and growth should be perfect , such kind of coins we can buy and keep , trading on those gives proper results.