Policy changes in several countries have significantly impacted the cryptocurrency market. China’s 2021 ban on crypto mining and trading crashed prices, given its dominance in mining. The EU’s MiCA regulation, effective 2023, introduced strict licensing and transparency rules, boosting investor confidence. Japan’s tax cut on Bitcoin gains from 55% to 20% in 2025 aims to establish it as a crypto hub, potentially driving adoption. The U.S. shifted from a regulatory crackdown to a pro-crypto stance post-2024 elections, with proposed tax reductions signaling market growth. El Salvador’s 2021 adoption of Bitcoin as legal tender sought inclusion but saw limited use. India’s 30% crypto tax and 1% TDS, introduced in 2022, stifled innovation, pushing talent to hubs like the UAE, which invested $30 billion to become a global crypto leader.