For most people, it is generally recommended to wait until you arrive in Vietnam to get the best rates. However, if you want cash in hand immediately upon landing, you have several options:
Buying Vietnamese dong (VND) is fairly straightforward, but the "best" place to do it depends on whether you are still at home or already in Vietnam. where can i buy dong
You will typically find more competitive rates once you are on the ground. For most people, it is generally recommended to
Services like Revolut and Wise allow you to convert your local currency to dong digitally and spend it via a travel debit card. For most people