> English people tend to openly despise it and will often refuse it even when they're perfectly aware that it's legal tender. Group A don't know it's legal ten

> English people tend to openly despise it and will often refuse it even when they're perfectly aware that it's legal tender. Group A don't know it's legal tender, so they refuse to accept them. Group B do know it's legal tender, but also know that group A is quite large. Hence some members (group BA) avoid the currency because they know it will make transactions with group A more difficult. The remaining people, group BB, also know that group BA will try to avoid the currency. Some of those (group BBA) will avoid the currency because it makes transactions with group BA more difficult. And so on.