$BTC China's policies are mentioned on pages 2 and 3, where China continues to strictly limit Bitcoin transactions, while India plans to increase transaction tax rates, as noted on page 1, leading to market fluctuations. Additionally, emerging market countries like El Salvador are pushing for the legalization of Bitcoin as legal tender, as described on page 3, which is also an aspect of policy changes.

It is necessary to integrate this information to ensure coverage of the policy trends of major economies, including the strategic reserves of the United States, the EU's MiCA legislation, China's strict regulations, India's tax rate adjustments, and the attempts of emerging market countries.