[Former UK Prime Minister's 'Bitcoin is a Ponzi scheme' view sparks controversy: Michael Saylor emphasizes BTC's decentralization and lack of issuer] Former UK Prime Minister Boris Johnson posted on the X platform, stating that he has long suspected Bitcoin to be a 'massive Ponzi scheme.' He added that recent cases of investment losses have made him more concerned that this judgment might be correct. In response, Michael Saylor, founder and CEO of MicroStrategy, disagreed with this view. He pointed out that Ponzi schemes typically require a centralized operator to promise returns and use funds from later investors to pay early investors. Bitcoin, however, has no issuer or promoter, nor does it guarantee any returns. It is merely an open, decentralized currency network driven by code and market demand.