People choose BTC because BTC was first. Everything else is pretty irrelevant compared to that. There are thousands of examples of products in the world that people choose--and continue to choose--merely because the product was the first one the masses of people had heard of. First mover advantage is an enormous benefit that has kept products going long after competitors made far better products.

Bitcoin's market share of digital currency market cap continues to shrink, even as Bitcoin itself continues to grow in value. Very soon, BTC will be in the minority of the total crypto market--it's about 55/45 now. When that happens, I suspect this will be a psychological barrier for a lot of investors, who will start to see that the serious growth in the market is going to come from digital currencies that are not called "Bitcoin".