Svmuu News: According to market sources, billionaire Jack Dorsey's crypto finance app platform Cash App officially launched a Bitcoin reserve proof feature this week, verifying to over 60 million users that its Bitcoin holdings are fully backed with 1:1 reserves. Market observers believe this move represents a significant step forward for the crypto industry in terms of transparency, user trust, and self-custody standards, and is also seen as a positive signal promoting the long-term healthy development of the sector. (The Bitcoin Historian)