I always check coinmarketcap.com every day and all trending projects.
Among trading projects, there are a lot of dogs meme coins. They raise a lot because dogs meme was a trend of 2021.
But maybe in 2022 the trend will become a cats meme coins likes this
https://twitter.com/angrykittytoken/status/1479171278171000833Everybody like cats and they are more popular in internet then dogs

Too much of new crypto projects because there is a big demand in new projects.
Many people prefer to invest money in new projects on their seed stage of development to have the maximum profit from investment.
When cryptocurrency market raise there is a big demand in new cryptocurrency projects.
That is why a lot of projects appear every day. Investors are looking for new and prospective for investment projects.
But when the market stop raise the demand in cryptocurrency projects stop too.