No one knows if the key break will take minutes, hours, weeks, years but I suppose it won't be one entity takes it all with a single attack in a single day.
There's no realistic way an entity suddenly gains power to break ECDLP within a few minutes.
And if the stealing lasts years or decades in small chunks nobody can prevent inflation pressure on Bitcoin, unfortunately.
Inflation pressure? There's no inflation pressure, and will never be. Provably lost coins are lost, gone, removed from circulation. Period. Non-provably lost coins aren't removed, they're just trapped. No one should assume they won't return into circulation, and in fact, we, overtime, observe some decade-old, dusted, 50 BTC worth outputs being spent, which reveals that these coins are falsely assumed as lost.
The system begun with the presumption to someday reach a number less than 21 million coins, and there's no entity that can change this rule.