Have we considered attacking it with a giant balloon sword? Interesting explanations here of why it's so hard to take down a stratospheric balloon.
Busting That Chinese Spy Balloon Is Harder Than You Think (Updated)
The sheer size of a stratospheric balloon makes it all but invulnerable, and it may be resistant to the weapons available. Such spy balloons, now spreading thanks to new technology, present a unique challenge for interception.
forbes.com