According to market sources, Cash App, the cryptocurrency platform owned by billionaire Jack Dorsey, officially launched its Bitcoin proof-of-reserve feature this week, verifying that all Bitcoin holdings on its platform are fully backed by 1:1 reserves for over 60 million users. The market believes this move is a significant step forward for the crypto industry in terms of transparency, user trust, and self-custody standards, and is seen as a positive signal for the long-term healthy development of the industry. (The Bitcoin Historian)