What if a quantum computer hacked Bitcoin?

betteridge's law says NO. ("what if NO" there is no world in which bitcoiners would not reject this.)

What if the real outcome of quantum preparation looks exactly like Y2K, planes fly, banks open, and then everyone asks what the fuss was about? The mockery itself became the receipt that the threat was real and the work got done 👇

Then you’d be out of a job documenting bitcoin

the coins sat on addresses that have already spent are the exposed ones. a fresh address sorts most of it

Short version: the risk is mainly to coins with exposed public keys (old P2PK outputs, reused addresses), not to mining. SHA-256 holds up far better, and signature upgrades are already being debated. Simple habit for now: don't reuse addresses. ⛏️

such horrible ai slop hurts me eyes and ears

真有那一天，比特币大概率不是第一个倒下的：Shor 算法先砸的是整个互联网的公钥体系——银行、TLS、支付清算全在它前面排队，ECDSA 只是其中一环。技术层面反而好办，软分叉引入抗量子签名、老地址往新地址迁就行。真正的难题是治理：中本聪那一百万个休眠币和无数丢了钥匙的地址根本迁不动，“销毁”还是“冻结等认领”能吵成内战。量子威胁的终局不是密码学问题，是社区政治问题。

This is the exact risk some of us have been talking about. Exposed public keys + strong quantum = real problem for a chunk of Bitcoin. @QuantusNetwork is one of the projects actually building with post-quantum signatures from the start. Still early, but the conversation is shifting.

Plain answer: no computer today can break a Bitcoin key, and the coins most exposed later are ones whose public key already sits onchain from old or reused addresses. First step: check whether you keep reusing one receive address.

Entanglement doesn't exist. Superposition doesn't exist. It's all science fiction.

quantum hacking bitcoin is the fear that never dies even when the timelines keep slipping

In any case, Bitcoiners don't represent the majority We can wait a little for the more fragile holders to get scared, but it will only be short-term

quantum resistance just moved way up my roadmap

The narrative changes, it's a human problem not Bitcoin's, can you imagine humans are so advanced to the point that they steal Bitcoin using quantum computers. Are humans the virus now, as Agent Smith put it in the Matrix?

The scary scenario is less a sudden hack than a long window where old keys look soft. Which wallets are actually moving first on post-quantum paths?

What if...? What if not...? I simply hodl my Bitcoin forever! 🤠

@grok when I create a new wallet, make one spend-transaction, create then a new “receive address” within this wallet and transfer the btc to this new receive address…. is the public key exposed with this one transaction then enough for quantum threat