According to Wu Blockchain, Castle Labs research shows that prediction markets hit a record-high monthly trading volume in April, exceeding $29.8 billion. Castle Labs stated that with Hyperliquid recently launching the first HIP-4 event market—focused on prediction contracts around BTC price on the 1st—the trading volume is expected to continue growing this month. Currently, the trading volume for the HIP-4 market has reached approximately $16 million.