According to the source, a Jan 19, 2026 X post states that restaurant chain Steak n Shake is doubling down on Bitcoin after crediting BTC with driving rising sales last year; source: X post dated Jan 19, 2026. The post does not disclose quantitative details such as sales contribution, rollout scope, or timing for the expanded Bitcoin initiative, so traders should seek the original company communication for specifics before positioning; source: X post dated Jan 19, 2026.