$5-10M is a very large amount I am confused if anyone would invest such a large amount together. And when a newbie account like yours says something like that, it becomes very hard to believe. If you can invest a large amount in Bitcoin for long term investment then it will bring you a bright future.  But if you panic after investing and see the price of Bitcoin drop a bit then you will lose a lot.  Bitcoin is a long-term investment.  So don't panic by investing here  And if you buy large amount of bitcoins then hold them in a hardware wallet which will be safe for you.