Re: Elon Musk finally weighs in on Bitcoin in a longer than usual commentary
So, when he gives his opinion on Bitcoin, you can take it more seriously than people like Warren Buffett or Mark Cuban. 
This makes sense but Elon Musk really does like the innovation but he is not an advocate of bitcoin and we have heard him giving his opinion when he is asked about bitcoin and rather than keeping silent he just responds what he thinks. Some of what he says makes sense, but the legal/illegal angle is just flawed. (Fiat is still used the most for illegal activities.) 
Two wrongs will not make them right, fiat is controlled by the government and even if that can be used for illegal activities how about a decentralized coin that will help them make things different, we have the answer in bitcoin where every transaction is edged in history in the blockchain unlike fiat.