What coin does London use?

Excuse me, could you clarify a bit about the question you're asking? London, being a major city and financial hub, doesn't necessarily use a single, specific cryptocurrency as its primary means of exchange. However, if we're talking about the official currency used in London, it's the Pound Sterling (GBP). Now, if you're interested in which cryptocurrencies are popular or accepted in London, that's a different story. Cryptocurrencies like Bitcoin, Ethereum, and even stablecoins like Tether have gained traction in the city, with some merchants and businesses accepting them as a form of payment. But it's important to note that the adoption of cryptocurrencies varies widely, and not all merchants in London accept them. So, to summarize, London doesn't have a "single coin" that it uses exclusively, but rather, it utilizes a mix of traditional and digital currencies, depending on the individual merchant or business's preference. I hope this helps answer your question!