From Idle CPUs to Potential 51% Chaos

Founded in 2014, the Monero network hides senders, recipients, and amounts through cryptography while keeping validation open via a CPU?friendly proof?of?work algorithm called RandomX. Qubic, created by Sergey "CFB"? Ivancheglo, exploits that same hardware. It's Useful Proof of Work (uPoW) splits each computer's effort: about half tackles artificial?intelligence (AI) tasks that secure Qubic, and the rest mines Monero during idle cycles.

The earned XMR is sold for tether (USDT), exchanged for QUBIC tokens, and burned, boosting Qubic's token value. So far, the strategy has proved magnetic. Qubic's share of Monero's global hashrate floated between 20?% and 30% in July. On July 28, Qubic's hashrate share reached an all-time high of 36.91% of the network's 6.15 gigahash per second (GH/s) of computational power.

Ivancheglo has teased an August demonstration meant to push past the critical 51?percent mark. If successful, a single entity could reorganize blocks, censor transactions, or double?spend funds—classic symptoms of a majority attack. For readers new to mining politics, hashrate is voting power: each solved block adds a new page to the ledger, and the majority decides which pages count. With more than half the votes, an operator can quietly rewrite recent history, invalidating honest work by others.

The economic lure is powerful. Dual?earning through uPoW can net miners roughly more than $3 a day per CPU, versus about 64 ?cents for solo Monero mining, internal estimates show. Analysts call it an "economic attack": instead of renting short?term hashpower, Qubic simply offers better pay and watches miners follow the money.

Monero's grassroots community has moved quickly. On Reddit and X, node operators begged miners to migrate to decentralized pools such as P2pool, while exchanges were urged to raise confirmation depth from 10 to 13 blocks to blunt possible reorganizations. Some contributors floated a RandomX tweak, consensus changes, or even a hard fork if Qubic's dominance persisted, though maintainers have not scheduled code changes.