The most popular currencies that travelers take with them on vacation are dollars and euros. They circulate all over the world and are easily exchanged for the country's domestic currency. Cupo en dolares will help you avoid shortage of foreign currency abroad.
Define a limit
The amount will greatly depend on the time you plan to spend in the country and the conditions of the trip. If you are going to an all-inclusive hotel, expenses are minimized - money will only be needed for souvenirs and excursions. And if you are going on an active tour, planning to visit a dozen countries in two weeks, then the expense sheet must be considered very scrupulously.
Image by Monstera from Pexels