Why was Bitcoin up on Jul 18, 2026, 12:43 AM UTC?

Bitcoin is essentially flat over 24 hours (+0.28%) with minor short-term weakness (-0.09% in 15min, -0.13% in 1h), suggesting consolidation rather than directional conviction. The recent news mix—AI competition, crypto regulation concerns, and geopolitical tensions (Iran)—appears broadly negative but lacks a single dominant catalyst strong enough to drive meaningful price movement at this moment.