How much does Optimism cost?

Could you please elaborate on the pricing of Optimism? I'm quite curious about the cost involved in acquiring this cryptocurrency. Is there a fixed price for each unit, or does it fluctuate based on market conditions? Additionally, what factors determine its price movements? I'd appreciate it if you could provide some insights into the cost structure and any potential investment considerations related to Optimism. Thank you for your assistance in clarifying this matter.