To give you an example of how many people are not only getting peace of mind from having bitcoin when traveling, but have become entirely reliant on it, next month check out he P2P trading orderbooks for Miami, when the Bitcoin conference is there.

If history repeats, there will be many sell offers, and an unusually high number offering to sell where they are looking for an in-person cash buyer. Sure, they could spend on gift cards, and such, but cash is what many want, and not many bitcoin ATMs are two-way (i.e., dispense cash as well).

For many of them, it's a bank debit card that they keep in their luggage at the hotel for emergency needs, and instead bitcoin + cash is used as their walking around money.