This is Carson's starting point. If you want to manipulate Bitcoin value, he told SecurityWeek, you cause a sudden increase in the number of users. This is most easily measured by the number of Bitcoin wallets in existence. A global ransomware outbreak, demanding payment by Bitcoin, would certainly have such an effect: both direct victims and judicious organizations are likely to obtain wallets.
But they should have made it possible to restore the files. This way ruins the method for future use because it is obvious that ransom is not the primary goal.
In previous versions of “similar” ransomware like Petya/Mischa/GoldenEye, this installation ID contains crucial information for the key recovery. After sending this information to the attacker they can extract the decryption key using their private key