It is obvious the only thing that can destroy or make this digital currency stop is we, the users. Bitcoin is mainly dependent on it's users and investors or holders. If the users and investors all in all dumped their bitcoin you will be seeing the price dump so hard. As it has a high possibility of having a price of $10K, it also have the possibility of going down, but with a low level of possibility of happening.

Many economists comment a negative about bitcoin because bitcoin have no real asset and true value.So question comes up like this subject that who can destroy bitcoin.The only thing that can destroy bitcoin is when there is no more energy or power that mines bitcoin.

Looks like no-one is understanding your question.

The direct answer to your question, is yes, you can “destroy” bitcoin but not in the traditional sense.

The blockchain holds a record of the coins that get sent in and out of an address. The only way to send coins out of an address is to use the private key that created that address. No private key, no ability to send or verify those coins.

One could potentially “destroy” coins by sending them to an address that has no private key, or to simply send it to yourself and erase all copies of your own private key. This will result in those coins being lost in that address forever effectively destroying them.

Though technically speaking, there’s no real way to confirm that you’ve deleted all copies of a private key.

Indeed. No one can destroy but I think there some instances that bitcoin would die. I guess if no one invest in bitcoin or no one use it will probably die. I think if there's no internet bitcoin will also die because it is the most important thing that you need if you want to use or access bitcoin.

By destroying I will define as a take a bitcoin (an entire unit) and destroy it. In theory the action of destroy is possible.

Use an invalid address with no private key: Just send bitcoins to an invalid address. For example: Bitcoin Address 1CounterpartyXXXXXXXXXXXXXXXUWLpVr
Use bitcoins to send data (notary document ownership or some ID). See Why New Forms of Spam Could Bloat Bitcoin's Block Chain
In theory, you’re not destroying bitcoins but in practice, you’re almost burning these bitcoins.

The big owners of bitcoin can destroy because of volatility of bitcoin when the owner did not use his bitcoin anymore or forgot their password the moment they did not recover it is to be consider lost bitcoin and when the number of bitcoin circulating in the market became lost or stagnant thet would be the start that bitcoin will be destroy.

Every thing can and eventually will be stopped. It's just a matter of time. But who knows when the time of Bitcoin will come?

I think Bitcoin has grown so big that at this point, Bitcoin is the only thing that could destroy Bitcoin. I am not against forks (and I am not supporting it too) but I do see that if we don't put our efforts into improving Bitcoin from user's side, developer's side and work on the current issues in order to resolve those issues then we don't need anyone to destroy it for us. I don't see any external factor as strong as internal factors having the capacity to destroy Bitcoin, to be honest.

I read that a quantum computer can kill bitcoins. I do not want to believe in it. Do you think this is a serious threat to the Crypto currency?

Unless all countries in the world ban ICOs, there is nothing can reduce the Bitcoin to zero or destroy it.