Right now there are more coins available in the market which gives you more profit than bitcoin.
Bitcoin price is also not stable.
All these factors affect its popularity ??
What you think, still bitcoin is more popular ?
Compared to previous years, bitcoin has been more popular than ever since btc started going out in the news and more people are aware about. Atcoins in the other hand, nobody outside cryptoworld knows they exist, so the first thing a new investor buys when joining in crypto is of course bitcoin, altcoins later on.