it's not the fastest but you must understand that faster coin have problems related to orphan
and it is the most valuable, its value is the highest compared to the other, other cons are just a good experiment for what bitcoin will need in the future to become better
Every day we can see more alt coins are getting created by the IT engineers. But still none of the the coin replace the bitcoin's potential and its price value. I do not think also some crypto coin will come replace the bitcoin's place.