Bitcoin fell and reached a low of 16 months at less than $72,000 in early Asian trade. There was pressure to sell in derivatives and exchange products. Forecasting markets soon had traders making fast adjustments to change expectations.The Polymarket Bitcoin prognosis now reflects 70,000 for the most probable level in February. The target was priced at 74 per cent on real-money contracts. That figure jumped 65% in days. Almost one hundred and seventy-eight million dollars of volume were focused on this particular strike.The statistics represent defensive positioning and not new optimistic purchases. The investors are seen to be centred on capital protection in the escalating volatility. There is a decline in short-term confidence in crypto markets.February contract has a small implied range given the range of $65,000 to $85,000. Upside targets have fallen out of favour very fast. The $85,000 contract dropped 61% to 29%.The $90,000 level holds just 12%. The $95,000 strike sits near 7%. Downside levels indicate measured fear and not panic. The $65,000 probability fell 13% to 39%. The $60,000 level stands at 19%.The single digits of the probabilities do not go above 55,000. Traders are thus hopeful that it will stabilise around 70,000 and not collapse. This trend determines the existing patterns of Bitcoin price prediction in the desks.Bitcoin had been trading at about $73,199 at the point of reporting. The token is down 16% year-to-date. The prices are at a point of about 40 per cent lower than the October 2025 high of $126,000.A number of macro aspects put downward pressure on sentiment. The increasing geopolitical tensions have damaged risk assets. The nomination of a hawkish Federal Reserve chair gave strength to the dollar. Last year, there was a 43-day government shutdown that was followed by liquidity concerns. The fall was also accelerated by technical damage.Over 5.4 billion dollars in liquidations struck since the end of January. Open interest was at its lowest in nine months. The recorded outflows in the US spot bitcoin ETFs were high.On January 29, 30 and February 3, the amount investors pulled out was 817m, 509m and 272m, respectively. One inflow day added $561 million. Total ETF assets fell to more than 97 billion from over 128 billion.The mark of 70,000 has technical and psychological significance. It served as a pre-resistance in the previous rallies. Now it is visible support.Traders in prediction markets tend to round off to integers. These levels also enhance liquidity. This results in smaller spreads and trades. The institutions thus take a hedge of $ 70,000. That behaviour is confirmed by the concentration of $1.78 million.At expiry, there is a tendency for markets to magnetise towards high volume strikes. The pricing in February indicates that gravity. Polymarket Bitcoin prediction is hence a real-time sentiment indicator.