In all my travels around the world, I’ve never been asked to show that I have sufficient funds to enter a country.
I know that a number have such a stipulation, but in reality, I think it is used when it is clear to the authorities (normally through appearance) that the person does not have any money (or very little), and is possibly planning to work illegally within the country.
If able to produce bankcards, no further questions would be asked. If they really are pushed – the authorities could determine your available funds/credit.