1) First mover advantage. Bitcoin is the easiest crypto currency to buy or sell for fiat. Every crypto exchange/atm/payment gateway supports Bitcoin and maybe s

1) First mover advantage. Bitcoin is the easiest crypto currency to buy or sell for fiat. Every crypto exchange/atm/payment gateway supports Bitcoin and maybe some altcoins like Ether or Litecoin. On crypto exchanges, Bitcoin is always the base market pair. Bitcoin is the oldest, most battle tested crypto, so people expect it to be the most secure. 2) Economics. Bitcoin is deflationary. There will only ever be 21m Bitcoins. Ethereum does not have a hard cap on the max number of Ethers. Each coin has its own economics. Smart investors will understand the economics behind each coin they buy into. Otherwise you end up buying Ripple at 40 cents each thinking its a bargain...