Yes it is. Money is anything widely accepted as a store of value, it exists in many forms such as currencies and commodities like dollars or gold. And since bitcoin is widely accepted currency so it is money.
Agree to this very clear explanation, since bitcoin can also accept as a payment, which is already a form of money. I can pay bills online because of bitcoin so it is also a form of money even if it is bitcoin as a 1st crypto-currency around the world. Bitcoin is can be use worldwide and easy to use. Bitcoin has a value which is now $6000. So I can consider bitcoin as money.