I'd like to thank yours in advance for all responses and perspectives, and I've reached a conclusion.

Quantum computers are a problem for the future, but currently, they're not yet a real problem. Most quantum computers are built to perform extremely specific tasks and are extremely expensive, which, at least for now, discourages any attempted attack. Of course, we'll eventually have to upgrade the network, and that will be a major challenge, but it's not a problem for today.