Arbitrage can be great for some people, but you need a large amount of funds on at least two or more exchanges. Also, you need be be certain your trading bot doesn't 100% empty your account if not functioning as expected!
This is where the risk of all this things gets worse because you definitely needs to have funds on this exchanges, the exchanges are mostly centralized ones that go off anytime. So just like you said it will be better not to trust one of this exchanges but rather split the funds in different types.
at OP i would advice you learn a lot about arbitrage marketing first before you put your funds any exchange, do not just believe the guide from this exchanges because some are misleading by looking so easy to understand but are not