Billionaire investor and dot-com veteran Mark Cuban had harsh words on Thursday for YouTube, the online site that lets people share video clips, saying only a "moron" would purchase the wildly popular start-up.

Cuban, co-founder of HDNet and owner of the NBA's Dallas Mavericks, also said YouTube would eventually be "sued into oblivion" because of copyright violations.

"They are just breaking the law," Cuban told a group of advertisers in New York. "The only reason it hasn't been sued yet is because there is nobody with big money to sue."