What is an ideal multiple access protocol?

Could you elaborate on what constitutes an ideal multiple access protocol in the realm of cryptography and finance? Is it one that ensures seamless and secure data transmission among multiple users, minimizes latency, and prevents collisions or data loss? Or does it also encompass factors such as scalability, adaptability to varying network conditions, and resistance to potential security threats? Understanding the criteria for an ideal protocol in this context would be invaluable for designing and implementing robust systems in the cryptocurrency and finance landscape.