Try to transfer 5M dollars to your bank account in the UAE? Most likely, the account will be frozen and you will be contacted to verify the source of the funds, let alone about 40M. It is a sufficient crime to imprison you for about ten years if the second party is unknown (and if you can prove that you are trying to sell bitcoin)
As for cash, it is absurd to be discussed in a public place.

In general, can a person with 40M ask in an anonymous forum on the Internet? What accounts create such topics?