Boris Johnson, former Prime Minister of the United Kingdom, has labeled Bitcoin a "Ponzi Scheme," adding to the ongoing debate about the legitimacy of cryptocurrencies. His comments come amid increasing scrutiny of digital assets by global leaders. Meanwhile, BlackRock, the world's largest asset manager, has announced it will maintain a conservative approach in its cryptocurrency exchange-traded funds (ETFs). The firm stated it will not venture into overly creative or risky crypto ETF offerings, focusing instead on more traditional investment vehicles.