How does this scam work?

I live in Shanghai. A girl from Hong Kong contacts me on What's App. She does an incredible job in being authentic and developing a friendship, nothing romantic. She sends me photos of her family, friends and it appears genuine but also low key wealth. She brings up Bitcoin and how she invested in 10 coins @$7000 and sold @$60,000. Says she knows "professional analysts" and now does pump and dumps, shares her screen with BTC/USDT pair, $1400 here $800 there. She invites me to join, says she'll let me know next time. Around 4pm she texts me that the pump is going to happen tonight but the time unpredictable. She advises me to try a small amount and decide if I want to join the project. I block her. I don't want to take this any further. Bitcoin pumps 3% around 7pm. It's $600 profit per coin. How did she know?

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