With due respect, I think you should at least make more explanation to justify your claim, because most people knew bitcoin is part of crypto currency but you said bitcoin itself is crypto currency. Do mean crypto is bitcoin as well or bitcoin is crypto like ethereum and all other coins?
The main point OP was trying to make is that blockchain is not synonymous with Bitcoin and other cryptocurrencies. I'm not sure where your confusion comes from because all he really said is that Bitcoin
is cryptocurrency, and that it's the best among all of them.