Well, no worries... When the first quantum computers come to consumer market, surely we have a working quantum crypto by then. https://en.wikipedia.org/wiki/Quantum_cryptography And the show goes on ...
The are expecting to be able to use quantum computers to decrypt all our existing encrypted data and communications they have stored on their servers but are currently unable to decrypt. This is why they are still encouraging the use of weaker encryption algorithms, like standard 10 rounds AES 256 when they know quantum computers are expected to break it.
If they decrypt all of my dicey stuff after I'm dead, who will care? Maybe my family and friends, but so it goes.
In practicality they're really still more science fiction than science fact. A computer that can basically crack the entire internet in a matter of seconds... We may invent time travel or Star Trek type transporters, holodecks or replicators by then too. I won't hold my breath over it. And as someone else pointed out cryptography will likely stay a step ahead of the game. It's logically more achievable to create a method of encryption like that to prevent such a thing from happening than to create a magic key that can unlock every door on the internet in a matter of seconds.