Bitcoin Forum

who runs and hosts blockchain ? and what happens if it went down ?

If you mean the blockchain.info site, it's owned by a party completely unaffiliated with Bitcoin. It's a private site with a block explorer and a wallet. If it goes down, well that's going to be problematic for its users.

If you mean the actual Bitcoin blockchain, it's not a website and is instead hosted by multiple people running nodes. It's why Bitcoin is a peer-to-peer currency. One or two going down wouldn't be a problem, and every single one going down is almost completely impossible.

I'm not exactly sure what you mean. Bitcoin nodes will respond to a well defined set of commands (called an API for application programming interface), so anyone who knows how can set up a website that calls those commands. This is why there are many websites that can tell you about the activity on the blockchain.

blockcain runs automatically with people who transact the blockcain of a decentralized transaction center in cripto currency, and when the price goes down it's normal in terms of trading and we should not be baiting with bulk sell.

Thanks for your very clearly explaination bro. It makes me understand more about blockchain technology