I am based in the UK. And while it is true that I am planning to launch my product in the UK first, I eventually gonna expand this globally. So should I charge my members in dollar or in pound?

I was thinking about how traditional sales have changed because of the Internet and the mindset of customers have changed to an active approach ("looking for what I need" instead of "being sold"). Wondering how do you approach the sales process for your products in this age of 'smart' customers