Bitcoin has a large lead as a store of value over other cryptocurrencies in having existed 8 years without failure. The security of Bitcoin has been proven far more than its much younger counterparts with usage by almost every metric exceeding that of cryptocurrencies.

Also, bitcoin has already lapped the field and has the ecosystem and the resources to compete with significant advantages. Bitcoin has two things going for it that help significantly in this respect. Stability and entrepreneurship. Both far exceed that of cryptocurrencies thus far and will make catching up very challenging.