According to BlockBeats, 10x Research founder Markus Thielen said that the recent inflow of Bitcoin spot ETFs from Fidelity and BlackRock was lower than expected, which may indicate that the Bitcoin sell-off has just begun. If ETF outflows continue next week, Bitcoin may fall below $60,000. But in the long run, Markus Thielen is still optimistic. Even if it breaks through the $100,000 mark, Bitcoin will still hit $83,000 in the future.