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Bitcoin (BTC) starts a new week in fighting form as $80,000 support survives a volatile weekly close. Key points: Bitcoin preserves the potential for upside continuation as one trader pencils in $85,000 for the …

Quantum computers still cannot break Bitcoin, but several major blockchains are preparing for a future in which they might. In the past week, Aptos proposed post-quantum signature support as Solana tested quantum-resistant transactions. Meanwhile, …