Muh blockchain! Muh decentralization! Bitcoin is old and broken!
You forget that bitcoin has:
1) The largest brand recognition
2) The largest merchant acceptance
3) The largest public/consumer acceptance
4) The largest regulatory acceptance
5) The world's highest hashrate, making it the most secure network there is (not vulnerable to a 51% attack)
6) Not controlled by a central body, no godlike deities who can dictate development procedures (ie. Vitalik Buterin)
Also, blockchain without currency is useless. And bitcoin is the best and most stable blockchain-based currency as of now.