That someone is a billionaire doesn't confine on them the right to lectureship. While the future is bright for Bitcoin and cryptocurrency, I believe you shouldn't take anyone's word as a financial advice. Follow your heart for only you should know what is best for you. That was how I followed the advice of some said "experts" in 2018 and bought a few Walton even at what is now ATH. Where is the crazy Walton now?