Diversify, diversify, diversify. Bring cash, plastic and traveler’s checks. ATM machines are available the world over and work well. Debit Cards have security issues; if your number and PIN are hacked, say goodbye to that hard-won $ in your account. Cashing back on credit cards will hit you with interest that can pile up quickly if you are not careful. Keep in mind that the advice here is to bring it all. Use the safest the most frequently. Be aware of which financial tool you are using what for.