Bitcoin 81500 USD life and death line! If this price falls, BTC may retest the $70000 range again! The latest on chain data from Glassnode reveals the most noteworthy key price points for Bitcoin at present. Three important cost lines: Average cost of US spot ETFs: $81500 True Market Mean: $77600 Average cost for short-term holders: $74800 Among them, the most important is $81500! Why? Because this price has played an important supporting and pressure role multiple times in the past few months. In May of this year, Bitcoin faced pressure in the vicinity and subsequently experienced a significant decline. And just last week, BTC fell below $81500, hitting a low of around $80100, but quickly rebounded. At the same price point, it used to be pressure, but now it is undergoing support testing! What does this represent? Near the average cost of ETFs, it may be a psychological and trading area that market participants are particularly concerned about. If Bitcoin can continue to stand at $81500, it means that this backtesting may be successful and there is still a chance for the short-term structure to maintain its strength. But if BTC falls below again and cannot quickly recover So next, we must pay attention to: ⚠️ $ 77600: Real market average price ⚠️ $ 74800: Short term holder cost line These two price points may become important observation areas for the next stage of the market. However, I would like to emphasize that: The cost line is not a guarantee of effective support, nor is it a magic number that prices are bound to rebound. What really matters is whether there is a buying frenzy or a sustained volume decline in the market when prices approach these regions. What I am most concerned about now is not guessing whether Bitcoin will rise or fall tomorrow. But rather: Will $81500 become the starting point for the next wave of rise or the last line of defense before another decline? The gains and losses of this position may determine whether BTC will challenge the $90000 range or retest the $70000 range. Do you think the cost line of this ETF can be held up? Responsible for analyzing with position.