If people would catch on to it then Bitcoin will be hardforked and everything will resume as if nothing happened.
I totaly do not agree. If something like breaking BTC's crypto happened, trust in BTC would be crushed and BTC would receive death blow from which it would not recover. Not because it's unsafe now (software change would fix it) but there would be no trust. No trust, no users. No users, no value.
If someone steals a lot of Bitcoin, before it gets fixed than yes. If the more likely Event occurs, that someone theorize about a method to "break" it and than a hard fork is made, before anything actually happens, than no, that would not be the death blow to BTC, the price might drop for a short period a lot of people would be happy about buying BTC at that low prices and some months later, a lot of people would be very angry about them self, when BTC returns to business as usual.