According to @coinsph, Bitcoin Pizza Day marks the anniversary of the first real-world Bitcoin transaction, where 10,000 $BTC were exchanged for two pizzas on May 22, 2010, then valued at $41. This annual event continues to be a focal point for the crypto trading community, influencing trading sentiment and promotional activities across major exchanges. As noted by Coins.ph, special promotions and potential airdrops are expected around this date, often resulting in heightened $BTC trading volume and social media engagement. Traders should monitor for increased volatility and market campaigns linked to Bitcoin Pizza Day, as these can impact short-term price movements and liquidity (source: @coinsph on Twitter, May 15, 2025).