On December 6th, Glassnode @Negentropic_ posted on social media yesterday evening (21:31) that as Bitcoin broke through $100,000, its fundamental index (BFI) began to weaken. This indicator usually sends early warning signals, and once confirmed, it is difficult to ignore. Take Quarter 1 this year as an example, every time Bitcoin reached a local high, the BFI indicator marked the exit time before the BTC price made a major correction. For now, Glassnode will continue to monitor this indicator, but the bull market is still there.