GEMINI exchange rates are suspicious

I do not trade in Gemini exchange. For my point of view, Gemini trading fees are high and exchange rates are not as fair as others in the competition. I have been using Gemini wallet as a storage for 3 years. I really believe storage of Gemini is safe and reliable. Besides all, one of the fastest verification I have ever made in cryptocurrency exchanges. It only took 5 minutes to verify my Gemini account.