What I was just advocating for, is taking ownership and control of the risk. If it's your own entire bank account perhaps with a few thousand dollars, that risk is thousands of dollars. By segmenting that you can reduce it to dozens of dollars in which case, no matter the coin flip of bank fraud and money return, you're never putting your eggs all in one basket.
I don't think you understood what my comment said. Fraud is prevented with credit cards, and that risk isn't there. It's smarter to use credit over debit, any bank will tell you that.
Also like I said witt Debit, if there's fraud then you're out of that money until it's returned. With credit, you will still be able to keep using it instead of potentially overdrafting/denied on a debit card. Or in the case of a prepaid travel card, you'd just run out, which would especially screw you over while traveling if that's your only method of payment. On top of that, it's easier to get scammed as a foreigner.
If you're still interested in learning, search engines are your friend. I am not a financial advisor.