Bitcoin has surged past the $78,000 mark, recording its strongest weekly gain in over three years. The rally follows a policy shift by the US Treasury, which announced a doubling of long-dated bond buybacks, effectively lowering yields and boosting risk appetite. Institutional interest has intensified, with US-listed Bitcoin ETFs attracting over $1 billion in inflows this week. Political optimism is also contributing to the momentum, following meetings between President Donald Trump and crypto industry leaders regarding the Clarity Act, which aims to provide regulatory framework for digital assets. Analysts note that Bitcoin has successfully cleared its 200-day moving average for the first time since late 2025, signaling a potential shift in market sentiment.