Erase your mind off it, everyone is talking about Quantum as if it's going to come from a alien, where humans can't tell the time or the date it will happen, Quantum computers are man made, we are the builder and we know the dangers of the Technology, if the world isn't ready for the dangers why built and release the technology? The problem isn't the Quantum itself, it's people like You OP making a big deal out of Quantum computer.
If OP have only limited knowledge about quantum computing, surely he will worry on this. Indeed, its considered a threat to global cybersecurity and modern digital cryptography but that kind of threat can be prevented. That's why we have to DYOR and learn how to upgrade the system and be aware of its data protection methods because this is the only way where we can prevent the security risks of quantum computing.
