Which is the Amazon of crypto?

Could you elaborate on the term "Amazon of crypto"? Are you referring to a cryptocurrency exchange or platform that dominates the market in a similar fashion to how Amazon dominates the e-commerce industry? Or are you perhaps asking about a decentralized application or protocol that has achieved widespread adoption and serves as a cornerstone of the cryptocurrency ecosystem? It would be helpful to have a clearer understanding of what you mean by "Amazon of crypto" in order to provide an accurate description.