That is enormous.
All other things you mentioned deliver real value for much much less.
And btc is not yet even used practically in any real world scenario in any relevant scale
You're making a claim that something predicated on everyone wasting tons of power to do hashing that just gets thrown away when the first person nails it and starts propagating, and all of that per 100 or so transactions, with at max maybe two to three dozen servers per bank, with full capability to reverse, adjust, reconcile, chargeback, so on, and so forth.
So no.
No, they won't shut down traditional financial processing. They don't need to.
The anti-car movement is truly insufferable, because, at least online, it seems it's mostly spearheaded by people from Europe who have never seen how spread-out America is. I'm not about to bike 30 miles each way to work every day, rain or shine, and yet I get looked at as the villain for suggesting people stop going outside when the weather sucks.
Rant over. I hate people.