Dogecoin is just a copy of Bitcoin but it landed on the top 20 that's because of Elon Musk, who is considered to be a big influencer in the market, so it is more of hype, and on what's trending, it's easy to make money from pump and dump coins if a coin has an influencer behind him and they engaged on creating hype, it's a domino effect, people will invest on coins that are getting the attention of investors even though they employed deceptive marketing.
Investors want quick profit they are easily swayed by hype, something they cannot get from projects that will take years to complete their roadmap and perform better in the market.