2Mil its too big amount of money. If I have 2M the half will investment in mining bitcoins and the half of the amount will buy bitcoin and hold I after in many years and sell if the price is double or triple your money.
Mining is also good but it's not easy. Probably the best way to invest that money is by buy bitcoin directly and divide it in some hardware wallet with full sync, because this is the most secure wallet. Wait until a few months or years, then he will get big profit from it. Creating bitcoin-related business is also good but it's not only need capital but also need knowledge and great team.