Is grade 8 stronger than grade 5?

I'm curious, when we're discussing grades in the context of cryptocurrency or finance, are we referring to some sort of rating system or level of security? Assuming that's the case, I'd like to ask: Is grade 8 indeed stronger than grade 5? What specific factors or criteria make one grade stronger than another? Is this a universal standard, or does it vary depending on the platform or service being evaluated? I'm eager to understand the nuances and implications of these grades in the world of crypto and finance.