why do you even insist on separating the two from each other?
it is like asking which one would survive longer, cars or combustion engines! bitcoin is based on blockchain technology and it is the one that introduced it to the world. bitcoin is also the one that is improving this technology and as the technology grows bitcoin grows and vice versa. they are not separate, they are one thing.
Thats why i am thinking where did this OP gets this idea,separating blockchain from bitcoin
Bitcoin will not exist without blockchain,and blockchain is here because of bitcoin
So they will stay for us together and forever,no need to choose between those two because they are inseparable