Answer: Everyone can come to this convention. If a person is given one chance in a lifetime to acquire a little of the spiritual world while he is in this world, then could he consider this as something that is not important? To underestimate such an opportunity is really a Klipa, a snake that is sitting within the person and preventing him from attending.
A convention is an opportunity to catch and receive something in one moment. Two or three days of a convention cover and make up for a lot of time of working and studying. This is clear profit.
From the 3rd part of the Daily Kabbalah Lesson 4/18/14, Writings of Rabash