Bitcoin is not money.
It is more an artwork with 21,000,000 limited editions. And each limited edition contains 100,000,000 limited pieces. (satoshis)
Bitcoin is not a currency but it can be used to pay any cost that accepts it. Bitcoin is worth more than money, but it has a fixed supply and cannot add. The value of Bitcoin will increase every day, but the money will always keep the price the sister it has.