Are you guys looking for the best rates in the market when deciding to buy/sell Bitcoin or you're bond with the certain exchanges where you have an account?
all stock exchanges will not be different, usually if there is a difference in the difference of many people who arbitrate, so the prices of all exchanges are almost the same to buy and sell bitcoin with usd, nothing is different, usually I see where exchanges that have high trading volume I will happy to make an account there because many users certainly look safe to me, another one I usually see from the withdrawal fee, the lower then I will be happy to be there, I have an account on binance