What is layer 4 crypto?
Can you please elaborate on what layer 4 crypto is? Is it a specific type of cryptocurrency or a technology associated with blockchain? How does it differ from other layers, such as layer 1 and layer 2? What are its unique features and advantages, and what are some examples of layer 4 crypto projects that are currently active in the market? Additionally, how does it contribute to the overall growth and development of the cryptocurrency industry?