NEW YORK (Reuters) -The likelihood of bitcoin ending the year below $90,000 has risen to 50%, according to online options platform Derive.xyz, as traders ramped up hedging against more declines in the world's largest cryptocurrency. On the other hand, the options market has assigned ​just a 30% chance of bitcoin finishing 2025 above $100,000. Bitcoin was last down 4.2% at $86,681.41 on Thursday, after earlier falling to a ‌seven-month low.