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.
In the past, I trusted bitcoin 100% but right now, I do not think that investing in bitcoin can give you a good money in the future. There are many different coins which you can have money from. AS you can see, ethereum has more chance to increase its price than bitcoin and ethereum can x3 of its price in the future. Mark my words