Former UK Prime Minister Boris Johnson has criticized Bitcoin, labeling it a "Ponzi scheme" in a commentary for the Daily Mail. Johnson argued that Pokémon cards hold more practical value as tradable assets than Bitcoin. He shared an anecdote about a friend who lost approximately £20,000 over three and a half years in Bitcoin-related fees without seeing any returns. In response, Michael Saylor, co-founder of Strategy, emphasized that Bitcoin operates as an open, decentralized monetary network without an issuer or guaranteed returns. Pierre Rochard, CEO of The Bitcoin Bond Company, highlighted the debt-driven nature of the UK financial system, suggesting it relies on continuous borrowing.