Bitcoin climbed to $85,000 on Monday for the first time in eight months, giving traders a fresh test of whether its recent recovery can turn into a sustained advance. The move follows a volatile stretch in which the cryptocurrency traded below $80,000 last week before regaining momentum. The $85,000 mark carries more weight than an ordinary price level. It is a round-number target, a fresh high for the recovery and a place where traders who bought earlier in the rally may choose to take profits. Reaching it signals strength; remaining above it would offer clearer evidence that buyers are prepared to defend the move.