What is a good CLV to CAC ratio?

I'm curious, what is considered a favorable Customer Lifetime Value (CLV) to Customer Acquisition Cost (CAC) ratio in the world of cryptocurrency and finance? Is there a benchmark or rule of thumb that practitioners in this field often look to as a guideline for assessing the long-term profitability of their customer base? And, how does one go about calculating these metrics to ensure accuracy and relevance in today's rapidly evolving landscape?