There are promising coins, but they don't have popularity in the market, so they stay in the shadows, I believe bitcoin has no competitors now
If you analyze this topic deeper, you will understand that bitcoin is a very narrow niche from the existing market. There are many areas in which bitcoin loses competition to other coins.
the fact is bitcoin is a lot of competition, because many coins who want to be no 1, such as the state of bitcoin first, especially now the longer the bitcoin board is also different so much to change also