Blockchain is another hyped technology by MBAs and CAs for IT/Tech security which has no real use. Bitcoin is part of blockchain. Just as Bitcoin fell from $20,000 to $3000, blockchain also fell
bitcoin did not fall from $20k to $3k
the $20k was a small fluke event. not a normal sustained price/value.
you word it like a seagul up high dived down into the water and never came back up.
reality is a whale leaped up out of the water and then splashed back to its natural level
.......
as for bitcoin vs blockchain
blockchain is the new revolutionary database model that needs no central storage. and bitcoin is just one type/form of data held on such a database model.