If somebody have 10 million, He or She dont need invest on anything. 
10 million is surprisingly little for a truly rich person. Regardless, rich people still invest their money. Who couldn't use a few more dollars?Well,
10 million maintained on a traditional saving account at rate 3% anually are 300k of interest.....It is a good amount for only keep it.
And with great interests come great taxes. Saving is a nice practice but it can also be considered as a liability if it is not bringing in new assets. Always think about how to improve and expand the boundaries which are set right now. Investing is always fun for rich people, because they use the money they wouldn't mind losing. Dumb investors put all in line and lose big. I always like to win smart than win big
