In the financial sector if there is a leak of confidential data, that's a serious threat, of course; I should have said that.
However, if you can decrypt it later, it's not entirely bad, because sometimes if you can decrypt in 10 years something that came out today, maybe it's not serious. It's only a threat if the information is decrypted at the time when it is still relevant, which in the financial sector could mean only a fairly short period of time later, if I understand your world. As soon as a quantum computer is available, if financial transactions that should be kept secret become an open book to competition, that could be serious. If it involved other countries, it could be a serious problem.
Quantum computing may offer good things for the financial sector. It is conceivable that quantum algorithms would be able to solve some problems in the financial sector more efficiently than classic computers can. We should not think of quantum computers as being evil. They are in fact mostly good as long as they're used for good reasons, like most other things. Now we're afraid of their use for bad purposes, but they have much more potential for good in the longer term.