How close are we to quantum computing being able to decrypt everything?

A friend told me that he had read that there are companies, countries, etc. collecting encrypted information. Collecting everything that is worthless today, because it is encrypted, but tomorrow with quantum computing that information will be very useful.
It really seemed quite dystopian and incredible to me to feel the presence of the future over... the past? Us...
But beyond what science fiction may have... how real can this be? And how close are we to everything we've encrypted being …

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