Apparently the audience you mentioned at the outset of the article was not well versed in the years of debate and discussion about QC in crypto circles. And then, so far as I can tell from the article, the author fails to follow up with the crypto community to learn what he's missing.

What he'd discover is that a large proportion of the global expertise relating to QC is already involved with crypto. Heck, there's been a "Quantum Resistant" Coin/Ledger (that's the name) for years on Coinmarketcap. The current status and risks of QC and how you can minimize risks and exposure is a regular topic in crypto circles. Plans and ideas for addressing various QC risks - ideally ahead of time, but abruptly if an existential threat appeared - are all part of the discussion.

The upshot is that if QC became an abrupt reality, cryptocurrency would be fixed fastest and first. Whereas potentially every password-protected system in the world would be laid bare - all legacy banking, the military and intelligence databases of every government in the world, every corporate database, you name it. Best wishes to those with accounts at smaller banks trying to hire from the limited pool of experts available in such a scenario.