I've yet to understand the finer details of this theory but looking at other web3 projects, I'd say the fiat value of dash may rocket. HOWEVER, this is dependent on a couple of things, neither of which I have high confidence:
1. Dash's website and marketing would have to shift dramatically to reflect dash at the forefront of web3 tech, while also minimizing the "digital cash" angle.
2. DCG doesn't screw-up again, potentially an even larger event than the chain halt.
Note: Elsewhere I have also expressed an opinion that dash could go as low as 14 USD. And I suppose this is still possible if dash fails to gain traction among web3 developers. It is also possible we are at the beginning of a bull market, so you'd have to balance these risks accordingly.