What is Coinbase & Blackrock?

Could you elaborate on the significance and functions of Coinbase and BlackRock in the world of cryptocurrency and finance? Coinbase, being a leading digital currency exchange platform, how does it facilitate the buying, selling, and storage of various cryptocurrencies? On the other hand, BlackRock, as a global investment management firm, how does it approach the realm of cryptofinance and how significant are its investments in this domain? Furthermore, how do these two entities intersect, if at all, in shaping the future of digital assets and financial markets?