With respect to the blockchain, almost all of the technology is available before bitcoin, but no one thinks it works until bitcoin, so bitcoin is the first successful application of blockchain technology. To the extent that bitcoin is the first blockchain there's nothing wrong with it. If you want to understand the blockchain technology, Bitcoin is indeed a thing that can't go around.
Blockchain did not exist before bitcoin. It was invented by Satoshi Nakamoto, whoever that is.
https://en.wikipedia.org/wiki/BlockchainI think they are not any relationship ,the bitcoin just a currency ,and the blockchain is a technology which was good for the company to save the cost.