Right now there are more coins available in the market which gives you more profit than bitcoin.
There are a more coins in the market but all of them are still depending their market and price to bitcoin so as you can see when bitcoin's price is falling, they are following.
Bitcoin price is also not stable.
What can you expect with a coin that's decentralized and isn't controlled by the government?
All these factors affect its popularity ??
Bitcoin is popular no matter what it affects and if someone will actually say cryptocurrency, the first thing that will come to their mind is bitcoin.
What you think, still bitcoin is more popular ?
Yes, there are news around there that are influencing bitcoin in a negative way.