21:00-7:00 Keywords: Brazil, Michael Saylor, Calacanis 1. White House: The United States will become the world's Bitcoin superpower; 2. Brazil's postal service seeks blockchain and artificial intelligence solutions; 3. Industry people: U.S. policies may push global institutions to accelerate their embrace of cryptocurrencies; 4. Michael Saylor shared the "$100 trillion" encryption strategy at the White House summit; 5. U.S. and European authorities seized Garantex's domain name and froze its $26 million assets; 6. Calacanis proposed a 0.01% tax on all U.S. cryptocurrency transactions, which was rejected by Sacks.