Bitcoin expert Miles Deutsher predicts that Bitcoin could reach a new all-time high in Q4.If Bitcoin follows the S&P 500 market, a 9% increase from its yearly peak could result in a price of $81,000.Bitcoin is currently lagging behind the S&P 500 market, but there is potential for it to catch up.The Bitcoin market has recently entered a bullish phase, and expectations are high for Q4.