Nine historical signals can produce a precise-looking table without establishing a reliable trading rule. An actual event-study response explains baselines, overlap, costs and selection bias.
Quantum attacks on public-key signatures differ from attacks on hashes. NIST standards and a Bitcoin proposal show why algorithm selection, key exposure and network migration need separate analysis.
Search interest is a useful lead, but it is not a count of customers or economic use. A dated ranking snapshot shows how to turn attention into a better research question.