If I upgrade my selling price, then will my gig impression drop down?
You can upgrade your selling price. But don’t price it too high! Because If crosses buyers budget It can loose buyers interest. Then your GIG could loose rank.
Yes it can be but It could be happened due to many other reasons . Some times it is not the main reason to drop your impressions. My suggestion you can try to keep basic gig price same and increase other packages pricing and drop some features from basic gig package. (Like : less no of revisions , Extend delivery days +1 )