Maybe this link can help you:
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https://www.bitcompare.de/) - BitCompare Bitcoin Exchange Comparison
It lists most the the top crypto exchanges today withdrawal fees, ranging from -0.025 - 0.1%. You can scan the list and see at the right side the user ratings. From there you can gauge which exchanges are safe to trade based on the votes. Example, Binance got 4.5/5 which I think most of the traders would agree.