Kanye's token $YZY seems to have just one burst of activity and then it runs out of steam. Those who jumped in early have probably made quite a bit already, and now it looks like after Alpha, they're starting to prepare for the spot market.
As long as the hype is maintained, how long can the celebrity meme trend last? If it lasts a bit longer, the speculation of contracts and spot trading could lead to another wave of hype, allowing $YZY to take off again. It all depends on Kanye's continued popularity.