Futuristic Bitcoin vault background for a Twitter banner — a sleek, high-tech digital vault glowing with warm Bitcoin orange and gold lighting, metallic textures, and holographic security elements. The Bitcoin ₿ symbol is subtly integrated into the vault door design, surrounded by circuit patterns and blockchain-inspired energy lines. The mood is secure, modern, and intelligent — evoking trust, protection, and innovation. Composition optimized for a wide Twitter header (1500x500), with clean space on the right for profile text. Style: cinematic lighting, ultra-realistic, AI-enhanced, 3D depth, soft glow effects. See more