Quantum computing poses a genuine risk to blockchain networks, but let's be clear — it's not something we need to lose sleep over tonight. The quantum machines capable of cracking Bitcoin or Ethereum's encryption? They simply don't exist yet. Sure, the threat is real in theory, but we're talking years, maybe decades, before quantum tech reaches that level. Current blockchain infrastructure remains secure against today's computational power. Still, the crypto community isn't sitting idle — quantum-resistant algorithms are already in development. So yeah, quantum computers are on the horizon, but they're not knocking on blockchain's door just yet.