Debit cards that use Bitcoin are definitely becoming a new trend, and I expect we'll see more companies coming out with them in the future.
I'm not sure if we'll see credit cards for a year or two, but I expect they aren't far away either.
I think debit card is quite enough.
most of these company trend is currency->BTC->other Currency
if use credit card, i think it is complicated progress
and I Think most using debit card is multi-national company or frequently traveler?
but i wondering the legal way
for example, if a Hong Kong [Suspicious link removed]pany. what is legal base when i'm Germany company to useit