The injection of positive volatility sent memecoins rallying Monday, with coins from the sector emerging as the cryptocurrency market’s biggest gainers. What Happened: Frog-themed Pepe was the best-performing cryptocurrency in the last 24 hours, with gains upwards of 25%. Its trading volume surged 90% to $1.5 billion, making it the most-traded memecoin over the last 24 hours. Solana (CRYPTO: SOL)-based dogwifhat was the second-highest gainer on the day, followed by Ethereum (CRYPTO: ETH)-based Floki. Both dog-themed coins recorded healthy upticks in 24-hour trading volumes. Additionally, blue-…