Thai Baht is not popular, nor convenient for purchasing in Vietnam. You should bring US dollars. It is easiest to change from USD to Vietnam Dong (VND).

See also other FAQs

How do the ATMs work in Vietnam?

Are there ATMs in the main towns of Vietnam?

Are credit cards (Visa or Master Card) accepted in Vietnam?

Are $US notes accepted at travel sites?

What kind of currency do you use in Vietnam and will it be easy to change other currencies to your currency?