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.