Yeah, what did you expect - that institutional investors will jump on the hype train of some obscure projects that have nothing to show except for marketing materials and promises of revolutionary technologies? 2017 altcoin season was driven by retailers, this time retailers are focused on BTC, because that's were the action is. And altcoins have lost their novelty factor, they are already old news, we already have years of performance data, and it's not looking good - alts don't do well in the long run, while Bitcoin does.