Bitcoin today will determine whether it's experiencing a downtrend searching for key support levels or a triangle breakout pattern. The pressure boundary at the dividing point is 71,500, with an extreme level at 72,550. If held down by 71,500, it will temporarily need to seek support lower, with the next critical support level at 69,000--69,300. The longer it consolidates above 70,000, the stronger the effectiveness of this support level! If it does break above 72,550 this time, temporarily treat it as a triangle breakout pattern, and short positions around 71,500 need to exit with stop losses around 70,800.