I can say bitcoin is the father of all crypto available now, and it is the first who first used blockchain as a system . So that this bitcoin has more worth than any other crypto with greater specs. It is the driver of the market and almost crypto is based on bitcoin.. In our life the more it is old the more it is expensive
There are some things in life that the older they get, the more expensive they are but it is only applicable in certain items and bitcoin is one of them but then we are still unsure of what might be its price in the future if it would be able to sustain its price or not. Even though bitcoin is the oldest cryptocurrency and you can consider having the most basic technology, it is the most valuable because it is the most famous of them all and compared to others that are just existing for trading purposes, bitcoin has been used both as a cryptocurrency and an asset. In short, it has the first mover advantage.
I don't know why bitcoin is the most valuable cryptocurrency in the world, but i guess it is because the earlier adopter bought it with high price,
so the current price is high too because no one sell it lower than they bought. There are many coins with a better spec indeed, but bitcoin is the most well known coin.
Maybe for those who bought it last December then they would still be at a loss but for those who bought it earlier than that, they would still be in profit. As for me, I have known bitcoin two years ago wherein its value is lower than $500 so I am still in profit multiple times but unfortunately, I made some decisions that make me lose those coins.