What are the three main types of mantle?

I'm curious to know, could you please elaborate on the three main types of mantle that are commonly discussed in the realm of cryptocurrency and finance? I've heard about their significance but am still a bit hazy on the specifics. Are these mantles related to the security of transactions, the underlying technology, or perhaps the various applications of cryptocurrencies? It would be greatly appreciated if you could provide a concise yet informative description of each type, highlighting their key features and roles within the cryptocurrency ecosystem.