But they do not and will not move, as all the institutional money is pouring into bitcoin.
We won't see a "year of the altcoins" for a very long time, at least not before bitcoin has reached one million.
Don't be too quick to be fallacious on your conclusion that there won't be an alt season. That's not going to happen.. Every bull run has always culminated in an alts season which normally begins when the former ends. At the moment, Bitcoin is still enjoying its moment of glory as price keeps breaking new highs. That isn't to say, anyway, that a few altcoins haven't been enjoying great price movements alongside Bitcoin.