I believe what drives this current crypto market is different from that of 2017, 2017 was about whales getting their hands on whatever and predicting/pushing prices up. This time around a lot of players are in the market, it is difficult to tell.
2017 was about ICOs but this year we've got the Defi, there's still sort of similarity but what's making the drive of the bull run this time is the demand and the actual investors. Bigger investors came in and they're not just investors but they're the institutions that have been caught interested to invest in bitcoin. The halving was another factor, the halving of bitcoin. It's what makes bitcoin stronger this time and the influence that it has affects most of the altcoins in the market with the combined events that they have like 2.0 for Ethereum and etc.