Having gathered a lot of scientists most likely will not give nothing. Any project moves thanks to only one person with a unique mindset. So no need to make congresses. Which newcomers will accidentally open a way to better mobilize.
Not really the case always. The key to solving complex problems is sometimes to assemble the best talent and allowing them to brainstorm. Let's face it Blockchain scalability is a complex problem due to the theoretical limitations. We'll need the best in business, whether its Cryptography or Distributed Systems or Economics.