The 2017 bull run was based on hype that was why shitcoins were able to give more profit because they were cheaper and people bought it based on the huge hype in the market then
But the next bull will be quite different from that and it will be based on real life usage and adoption so any project or altcoin that doesn't offer real usage or solve a problem will beat the dust.
We will never know when the cryptocurrency bull run occurring again, but i believe it will happening.
and we should not expecting the bull run too much, because our expectation may not meet at all.
Real life adoption is one of the factor that maybe drive the cryptocurrency bull run again.