12.28 Key news;
1. Data: USDC circulation increased by about 1.1 billion in the past 7 days;
2. Michael Saylor: 60 companies hold more than 590,000 BTC;
3. Volatility Shares applied to launch a leveraged ETF based on Solana futures;
4. ProShares submitted 3 stock index, gold and Bitcoin hedge ETF applications to the US SEC;
5. The suspected VIRTUAL project address deposited 2 million tokens into Bybit again 2 hours ago;
6. 21% of Polymarket bettors believe that Bitcoin will jump to $150,000 by March next year;
7. Santiment: Cryptocurrency trading volume decreased by 64% in the past week, especially speculation
