Is BTC done for? Quantum Computer Countdown: 2028

Someone created an online “Quantum Doomsday Clock” tool, claiming that quantum computers will crack Bitcoin private keys around March 8, 2028—just 2 years and 4 months left. This theory comes from cryptography expert Richard Karbak and entrepreneur Colton Dillion, who calculated that it would only take 1,673 logical quantum bits to do it.

But this is highly controversial:

➤ Radicals (2028 prediction): These two’s forecast
➤ Conservatives (2035-2039): NIST and the Global Risk Institute’s view
➤ Google’s side (around 2030): Craig Gidney’s new paper
➤ Blockstream’s Adam Back: At least another 20 years, don’t panic

Current tech status: IBM plans to build its first fault-tolerant quantum computer, Quantum Starling, by 2029. Google’s Willow chip has already achieved 105 quantum bits.

The current issue: Old addresses (P2PK, reused P2PKH) are at high risk, while new Taproot and Segwit addresses are relatively safe since they only expose the hash.

Is this wave a real threat or just marketing hype? What do you all think on-chain?