Cash

Pro:
Convenience: Cash is handy for smaller purchases such as coffee breaks, entry into museums, or tipping.

Cons:
Lost or Stolen: Think about how much you’re comfortable carrying and how much you can afford to lose. Use a money belt or store it in your hotel’s safe.

Conversion fees: Changing your money into foreign currency can come with hefty fees, avoids airports, hotels and kiosks. Banks are the best bet.