The Colossal Clean Crawled Corpus (C4), a widely used AI dataset, incorporates data from crypto platforms, potentially introducing biases. Notable sources like the SEC, Bitcointalk.org, Cointelegraph, CoinmarketCap, IPFS, and Steemit contribute to the dataset. The inclusion of crypto sites in C4 raises concerns about biased outcomes and controversial content, highlighting the need for further examination and improvement.