If you are not looking for academic conferences, you would probably be interested in various blockchain meetups and exhibitions of blockchain-related projects around the world. Keep in mind that the entrance fee is usually quite expensive there, though. If you are looking for a place to share your thoughts and knowledge, you can start with posting stuff on this forum as well as making an account on Medium and Steemit. If you are really good at cryptos and blockchain, you'll like steemit, since it allows you to earn money for high quality content. Once you become known to community, you can try your luck with finding a job in some blockchain project (probably an ICO). After getting some work experience, you can try being an advisor for various projects and be hired truly for your thoughts. Good luck!