Should I take cash or a card to Bali?

You should take both cash and a card to Bali. A travel money card is better than cash for security reasons and that in most places in Bali you can pay with a card. No one can access your cash unless they have your 4 digit pin. If you lose your travel money card you can quickly report it lost or stolen to stop unauthorised transactions. Cash is better for tipping, on transport and in markets.