Multiple sources strongly corroborate that the severe devaluation of the Iranian rial has driven significant adoption of cryptocurrencies, including Bitcoin, as a hedge. Reports mention Iranians 'flocking to crypto,' directly link the rial's devaluation since 2018 to rising Bitcoin demand, and note that government restrictions on exchanges affected over 10 million users. While the provided evidence confirms a 'collapse' and 'hyperinflation' of the rial, it does not contain the specific 'over 90%' figure, preventing a 1.0 confidence score. However, the core assertion is very well-supported.