If satoshi nakamoto suddenly decides to become devil and crashes down the server and take away all the money?
Then what will be the value of the bits??? again $1.
I don't think you understand how bitcoin works.
Bitcoin doesn't work like that. Satoshi can't come and suddenly shut down "bitcoin servers" which do not exist in the first place. The whole point of bitcoin from the beginning is to create a decentralized environment where people can trade and transact.
First of all, it'll never crash below $1000 in my opinion again. Even if it does, it's for a reason. Sure investors will lose money but bitcoin framework still works.