With money that big, you should buy bitcoin and wait for sometime. A small increase in price would mean a great amount of money with that big capital.
I would split it in bitcoin etherum and waves cause together he wont lose to much buut it is 99% sure that he will earn some.
Investing in bitcoin and ethereum is the best thing to do as if you invest in both of them then your money is secure and in long term you will get great returns on your investments and I would also like to diversify my investments by investing in monero ripple waves and digibyte to minimize the risks of loosing money.
It is also good to invest in a legit ICO. There are lots of investors that had tripled or increase way more their investment in ICO after sometimes. They just to make sure they had researched it thoroughly and not some scam ICO. Though if you want to play it safe, just buy Bitcoin and keep it for a very long time.