How could 13-14 million usd worth of bitcoin be invested in such a way that it will grow exponentially like 10x over gradually in a couple of years in the u.s.? Would this be feasibly possible or not? How could this much bitcoin be put to work? What kind of investsments will allow this?
You don't need to invest that money, the fact that it's already in bitcoin you already have an investment that could grow as crazy. 10 years ago Bitcoin was at $400 when i started using it, and now is at $63000, so, we are talking about something bigger than x100 but the hard part is to hold for a long period of time, if you can do that, then you will find success in your investment.
If you only want to invest for a couple of years, then i would recommend moving to another altcoin with a nice future, that way your investment would grow faster.