I used to do a fair amount of Bitcoin arbitrage years back for profit. I had to quit eventually and a big reason what what you faced. It's too easy for man in the middle attacks to do fraudulent schemes. Even if you yourself avoid the fraud, the bank will still have to deal with problems associated with your account and freeze your account and close you down for life because it's simply not worth it to them. Overall, not worth it unless if banks become much more robust which I honestly never see happening in my life time.