That's nothing, less than 10 million. He made a ton more off vitamin water investment, royalties, album sales. Get rich or die trying went 10x platinum world wide.
But you are only thinking about the current price, yes for someone like him that amount of money may not be much, but bitcoin is only worth 12k, I will not be surprised if bitcoin was worth 50k in the next 5 years and I think I'm being conservative, so his investment can go up so much that it eventually becomes a huge part of his portfolio of investments.