The main reason why he is interested in dogecoin is that he can use it as a tool of manipulation the market and use it as speculation instrument. He can’t raise Bitcoin or Ethereum by 100 times using just his twitter, nevertheless he can do it with shitcoin, so he uses this strategy to make money. Some people will object that he is too rich to do so, but can money be superfluous?
He already made a lot of money shilling DOGE, the money he made, he can use it for his business or invest it in bitcoin, so whatever happen to bitcoin, he will not lose anything as his investment is coming from the profit of shilling DOGE, it's an easy money for him, and that's how smart he is.
