Who is the King of Crypto?
I will give you a list of reasons why Bitcoin is still the king of cryptocurrencies and why it will stay there for a long time:
It is the original cryptocurrency, the granddaddy! It is the cryptocurrency that gave birth to other cryptocurrencies, it inspired a revolution, so to speak, and that alone makes it more important than most other options on the market
Continuing the previous point, many cryptocurrencies are just copies based on BTC code, and in most cases, they do not solve any real problems, and thus they have no real utility.
A lot of people use it, and this is another reason why it dominates the market, because there are more people using BTC for transactions than any other cryptocurrency.
It is very popular, and therefore, it is the first cryptocurrency that people buy and WILL buy
You can trade FIAT money directly with BTC, and that is not the case with most cryptocurrencies, except ETH, Ripple, BCH, and a few others. If you want to buy other coins, you will first have to buy BTC, and that is not going to change anytime soon.
This is why BTC is worth more than other cryptocurrencies. It is quite easy to understand.
Will ETH, NEO, or another cryptocurrency replace it? Perhaps, only time will tell, because when it comes to crypto, everything is very wild and volatile.