Probably the same reason he's building a 77 vehicle parking garage on his property..just because he can. I read that the statue would be part of Crow's collection known as Crow’s “garden of evil.” The sculpture garden is actually on and maintained right at his Dallas, Texas estate. Crow's point apparently is to have representations of many of the most infamous dictators and authoritarians of the 20th century.
Money, ah yes, the root of all evil, which can often leads to many unethical things. Things that actually do not posses any real intrinsic/essential value. It's just another perfect example of pure greed.