Today, we're providing a reference range for Bitcoin's bottom based on mining costs. Core logic: When BTC price drops near the shutdown price of mainstream efficient mining rigs → causes a large number of rigs to shut down → network hash rate decreases → selling pressure eases → buying Bitcoin at this point is equivalent to mining at zero cost, often marking a major bottom or rebound (historically high success rate). From the chart, you can see that when Bitcoin's price is above $55,000, mainstream new rigs are still fully profitable. When Bitcoin's price drops to the $45,000 ~ $55,000 range, the majority of mainstream rigs start shutting down. Combining this with our technical analysis from yesterday of $57,000 ~ $48,500, we get an overlapping public bottom-buying zone: $55,000 ~ $48,500 range.