The next few months are crucial! So far, the Stock to Flow (S2F) calculation model of PlanB has proved its worth. Its forecast for August 2021, of about 50,000 US dollars, hits the mark. Currently, the value of the BTC/USD is 49,000 US dollars. If the S2F model continues to be right, the value of the cryptocurrency would be 135,000 US dollars at the end of this year. However, experts have concerns about this: The $50,000 seems too high a hurdle.