"My account is about to be liquidated!" At nearly 10 p.m. on Monday night, this message suddenly popped up on my phone screen. It was from Xiaolin, and the screenshot she sent was frozen at $85,231—the level where Bitcoin paused for breath after dropping below $86,000 intraday.

This girl has only been a nurse for two years. Last year, she bought in at the peak around $110,000 and got trapped. This time, she scraped together $50,000 in principal and came to me, only to run into this situation again.

I glanced at the market software—Coinglass data showed the number of liquidations in 24 hours soared to 218,800, with over $1.2 billion evaporated. But on Coinbase, the circulating supply data was still steady at about 19.9 million coins, and the CME FedWatch tool even showed the probability of a 25-basis-point rate cut in December had climbed to 87.6%.

"Don't do anything," I replied to her. "This is an emotional stampede."

I told her to split her remaining funds into two parts and add to her position at $85,800 and $87,200. Sure enough, in the early hours of Tuesday, Bitcoin bounced back from the bottom. Xiaolin sent several exclamation marks in a row. I repeatedly told her not to stare at the intraday chart. By Wednesday afternoon, when the price had firmly stood above $90,000 and a certain trading platform showed Bitcoin’s 24-hour contract trading volume surged to $28.62 billion, the signs of capital absorption finally became clear. I told her to set her take-profit point.

At 3 p.m. on Thursday, my phone kept vibrating. In the screenshot Xiaolin sent, the selling price was at $92,100, right within the pullback range from the overnight high of $92,840. "After fees, net profit of $11,500!" She also sent a screenshot of a bubble tea order, "I’ll cover all the bubble tea this year!"

I opened her position record and took a look. The two additional orders were timed perfectly, pulling the total position cost down to $88,300. Honestly, there was no secret—just watching for signs of capital inflow after the Bank of Japan's December rate hike hint was confirmed, plus the strength of the key $90,000 support level. These signals could all be read from the volatility in Coinbase’s $74.744 billion market cap.

Xiaolin asked if she should buy back in. I sent her the latest price screenshot: "Now $91,860, down 0.26%, let’s wait a bit."

Money is never made by luck. Just like how she keeps a close eye on patients’ heart rates during night shifts, I watch the capital flows and macro policy signals behind the candlestick charts—that’s the most reliable "stethoscope" in the crypto world.