Did you know that you could make money in Crypto through arbitrage? I believe arbitrage is a Business!
Do you also know that arbitrage is like gambling, i believe you could loose and take a big risk engaging on arbitrage trading, why do you want to make money when the risk is not encouraging to go for, many of the online platforms also do not support this kind of trading, but when you're too eager to take risk in making money, you may go for it at your own personal interest, then get ready to face the outcome as well.
Taking the risk is not the issue, but I believe the OP needs to learn more about arbitrage trading because what he has presented is not the correct information he requires, even though the OP is correct in certain areas.
China has banned Bitcoin for a long time; although I know he is citing it as an example, I the OP need to know that arbitrage is risky and profitable when you have a lot of capital because the profit is small if you have little capital because almost all exchanges that have listed the coins you want to trade have the same price range, so the profit is small.