Elon cannot destroy anything. He's not strong enough. It may create a short-term manipulation, but it is an inevitable fact that the bitcoin and crypto world will dominate in the long term.
Now i understand the concept of everything you are saying, this Elon is person that is against cryptocurrency, from what i read and understand about cryptocurrency, i found out crypto can not be destroy by any one even to manipulate it is not possible, this crypto everybody on Earth is talking today is a plan of one man which is Satoshi nakamoto and only him as i may think only him has the key of crypto, the necessary documents belong to him also, so whoever that come in respect of destruction of cryptocurrency will have the format before anything, in summary it's not possible for the so called Elon to destroy crypto.