Bitcoin trades near $84,000, down 3.5% on the day. StarkWare has reduced the cost of building a quantum-resistant Bitcoin transaction from $320 to $67, representing a 79% reduction in just one week. This significant decrease came through the Quantum-Safe Bitcoin Optimization Challenge, a joint initiative with Yukon Research and Eigen Labs that invited developers, researchers, and AI agents to optimize GPU-hours needed for the transaction. The critical support zone now sits at the $84,000-$84,400 band, overlapping a key Fibonacci retracement level and the recent breakout shelf. If this support breaks, the next downside targets would be $82,193 followed by $78,571.
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