What is AAA risk?

Could you please elaborate on the term "AAA risk" in the context of finance and cryptocurrency? Is it a specific rating system used to assess the creditworthiness or stability of a particular asset, investment, or even a cryptocurrency project? If so, what criteria are typically considered when assigning such a rating, and what implications does an AAA risk designation have for investors? Understanding this terminology is crucial for making informed decisions in the volatile world of finance and cryptocurrency.