Cards are sold on lounges and points, but the features that save money abroad are simpler. Which four things to check before you apply, how to use the card without paying interest, and why you still need a second card.
Wise, Revolut and similar accounts let you hold several currencies and spend at close to the mid-market rate. How they actually save money, the fees that still apply, and the situations where your ordinary bank card wins.
A travel emergency is usually a money-access problem, not a money problem. How to size a reserve for a long trip, split it between accounts and cash, and make sure you can actually get at it when a card fails or a hospital wants a deposit.
Most of the cost of changing money comes from a handful of avoidable choices. The places that quietly charge the most, how to read a rate board, why the condition of your notes matters in Asia, and a simple rule for how much to change.
The offer to pay in your own currency appears at card terminals, ATMs, hotel desks and checkout pages. It always costs more than paying in the local currency. Where it hides, what the screens look like, and the habit that beats it.
Every Thai ATM charges a fixed fee on foreign cards, and the "convert to your currency" screen adds a hidden margin on top. What the fees are made of, the one button to always decline, and the cheaper ways to get baht.
Licensed exchange booths in Thai cities usually beat banks, airports and ATMs on rate. How to read a rate board, why the condition and size of your notes changes the rate, what to avoid at the airport, and how much cash to carry.