If you have 500,000$ and you don't know on what to invest them on, take your time and research well the cryptocurrency space before investing, don't put your money just because X said so
Whatever you do, just make sure your research for investment in cryptocurrency doesn't take you to China as there is a hard knock on ICOs there and 60 of the exchanges registered there are under scrutiny now. Already done cryptos there have taken the plunge and are delisted. OP, just be careful if truly you seek advice on how to spend $500,000 on investment here. To be honest I don't think you would make strangers your financial advisors.