"A card with an abstract design featuring a blend of colorful coins and currency

"A card with an abstract design featuring a blend of colorful coins and currency symbols, symbolizing flexibility. The background should be a gradient of vibrant colors, representing the card's ability to act as different denominations. Overlay text should include a prominent '$' symbol in the center, with smaller text reading 'Variable Value'. The border should be dynamic, with a mix of metallic accents to reflect its versatility."