I don't have an answer for you, but if you look at any other major innovators in history you'll see that just because they were the first doesn't necessarily mean they'll be the dominant player in the long run.
Look at Blackberry, arguably they were the first company to come out with the smartphone, but Apple took over and now Blackberry is a distant memory. Same with Kodak, they were dominant in photography and with the invention of digital cameras they were non existent.
The same could happen with Bitcoin as well. I feel that the high transaction fees and slow transaction processing could be the fall of Bitcoin. As more people start to take crypto seriously then another player with lower fees and faster processing could end up dominating. Only time will tell.