Acrylic is a superior solution for protecting silver and gold coins due to its exceptional clarity, high impact resistance, and ability to block harmful UV light. Unlike polystyrene, acrylic is more resistant to scratching, making it an ideal choice for preserving valuable coins without compromising their aesthetics.

Polystyrene is a cheaper, more versatile thermoplastic known for its lightweight nature and ease of fabrication. Opting for cheap polystyrene coin holders may compromise the longevity and quality of the coins they hold. While polystyrene can be considered relatively safe for short-term coin storage, it's not ideal for long-term use because it doesn't provide a good barrier against moisture and oxygen, which can potentially damage a coin's surface over time; for best coin preservation, collectors usually opt for specialized holders made from PVC-free materials like the acrylic holders.

While both materials have their unique advantages, investing in acrylic coin holders stands out as a premium choice for safeguarding precious coins thanks to its superior protective qualities.