Every quantum-resistant crypto in Q4 2026 I’m interested in the quantum trade. I’m much less interested in paying a quantum premium for a roadmap. Going into Q4 2026, i checked which chains actually protect user transactions today. My starting point is simple: does the signature authorizing a normal spend use post-quantum cryptography by default? That only establishes account protection. Consensus, bridges and data availability need their own checks. Here’s my map in October. The clearest examples of default post-quantum transaction signing: → @QRLedger | $QRL: Zond adds ML-DSA-87, PoS and EVM compatibility, but remains on testnet. The latest update put audits and remediation at 60%. → @mochimocrypto / $MCM: WOTS+ signatures on a live mainnet since June 2018. → @PQabelian / $ABEL: lattice-based transaction security with privacy. Its cryptography draws on Dilithium and Kyber research. → @cellframenet / $CELL: Dilithium is the default signature, with other post-quantum schemes supported. → @tidecoin / TDC: Falcon-512. An important correction here: its signatures are lattice-based. → @QuantusNetwork: mainnet launched Sept 9, with ML-DSA-65 and ML-DSA-87 signing. The distinction = deploying post-quantum signatures doesn’t establish that the whole implementation is independently audited or economically secure. Established networks have made progress, mostly through optional accounts: → @Algorand / $ALGO: native Falcon-1024 accounts went live, with wallet and developer support. Account protection remains opt-in. → @NervosNetwork / $CKB: users can protect funds through a SPHINCS+ lock script. → @solana / $SOL: the Winternitz vault provides a specific post-quantum custody option. → @Starknet / $STRK: a Falcon-512 account executed a mainnet transfer. The next group is testing or planning migration: → @trondao: post-quantum support on Nile testnet. → @QANplatform: public testnet; I’m watching audits and mainnet delivery. → @BNBCHAIN: ML-DSA and pqSTARK migration research. → @XDCNetwork: post-quantum development and a migration roadmap. → @Bitcoin: BIP-360 and BIP-361 remain drafts. → @ethereum: targets resistance across execution, consensus and data by December 2029. → @Ripple Ledger: targets full readiness by 2028. → @StellarOrg: has published a Quantum Preparedness Plan. I’d need stronger production evidence before adding NEAR, Aptos, Cardano, Sui, Tezos, Hedera, Nexus or xx network to the default-protection list. I’m most curious whether the smaller native chains can attract sustained usage, and whether established networks can migrate existing capital without making transactions materially more expensive. DYOR.