It pays to be paranoid.

Card skimmers are common everywhere not just in Europe. The same advice where you charge your phone make sure to use a plug and not to just plug the USB cable directly into a power source.

There are ways around this if you’re at a coffee shop, airport or on a train and have forgotten the plug, you can get a USB condom (ha ha, yes I know) which works the same way as a regular condom to avoid getting viruses but instead of latex and lube it’s an electrical circuit that stops anything malicious infecting your IoT devices. just make sure you don’t forget that!