Bitcoin today is dominating all crypto-currencies because its so widely accepted by people.
Bitcoin today has been listed on all exchanges as it’s the major conversion crypto-currency.
Success of Bitcoin has made BTC accepted in many businesses like Microsoft, Dell, Lamborghini, etc
As normal mining today is of no use in bitcoin, its converted into Pool & cloud mining.
Few countries economy got backup and support with BTC as its decentralized network and no one controls it
Bitcoin is the first digital currency or cryptocurrency which has maximum number of users today as BTC and USD only ways to get Alt-coins.