[Trumpisourlastchance]

Gold and silver are not hackable. Real stores of value for millenia.

[Right_Wing_Madman]

Not only is bitcoin vulnerable to Q-Day, but the entire banking system depends on encryption. Entire bank accounts could disappear on Q-day.

But Q-day is far away. Error correction in qubits is proving to be more difficult than thought, and it may be impossible.

[NoLibZone]

Entire banking system is vulnerable.
Social Security is vulnerable.
All pensions are vulnerable

[NoLibZone]

Timelines (credible but not guarantees)

• IBM publicly projects a first large-scale fault-tolerant system before decade’s end; Google says commercial apps could appear within ~5 years, while others (e.g., Nvidia’s CEO) argue it’s more like 15–20 years—illustrating genuine uncertainty. 

• Independent market analyses expect meaningful economic impact through the 2030s if the tech keeps advancing. 

[NoLibZone]

Bitcoin can be upgraded—without breaking backwards compatibility—to add post-quantum (PQ) protections, and there are already concrete proposals on the table. The idea is to introduce new address/script types that verify PQ (or hybrid PQ+Schnorr) signatures, then let users move coins into those addresses. That can be done via a soft fork. 

How it would work
• Add PQ signatures to Script/Taproot. Two well-discussed paths are (a) re-adding OP_CAT so wallets can use Lamport / hash-based signatures in Taproot script paths; or (b) a dedicated opcode (e.g., “OP_SPHINCS”) to verify SPHINCS+ (hash-based) signatures directly. Both are soft-forkable and let funds hide a PQ spend path today, then use it when needed. 
• New “quantum-resistant” addresses. BIP-360 (P2QRH) proposes address types that use NIST-standard PQ signatures (e.g., Dilithium or SPHINCS+), optionally in hybrid mode with current Schnorr, so the network can migrate gradually. 
• Standards exist. NIST finalized PQC standards in 2024 (FIPS 203/204/205), including CRYSTALS-Dilithium and SPHINCS+ for signatures—natural candidates for Bitcoin if/when adopted. 

[E. Pluribus Unum]

And we are just five years from flying cars, too. Again.

[Nateman]

...elliptic curve cryptography...

I was surprised to learn there is no general formula for the perimeter of an ellipse. In the special case of a circle we have the number pi . Even pi has no finite formula. It is generated by summing up the terms of an infinite series. Pi is now know to 100 trillion places. Ellipses occur all over our Universe. It is the path objects in orbit follow. Even that is an approximation because some energy is radiated away in the form of gravity waves. For the Earth that is about 120 watts. About the power of a typical incandescent light bulb.Given Earth's total kinetic energy the sun will become a White Dwarf long before the Earth could have spiraled in .