1. As a consumer, it's fast and cheap. My dad in France can send money, instantly, to me who live in the US. No waiting days for wire transfers. No trip to a local Western Union branch necessary. No exhorbitant fee (worldwide remittance fees average 9%!) I don't even have to bother exchanging the coins with dollars to spend them, because more and more merchants begin to accept Bitcoin.
2. For consumers in countries who do not have a stable currency (Argentina with 30%+ year-over-year inflation!) - Bitcoin helps them protect the value of their savings.
3. As a merchant, Bitcoin reduces fraud to zero from my viewpoint. When my site receives a Bitcoin payment from some first-time customer from a foreign country, I can still ship the goods or services to him without worrying it is a fraudulent purchase that will be charged back, because Bitcoin payments are irreversible unlike credit cards.
4. As a merchant, I make more profits. CC payment processing companies typically charge approximately $2 on the purchase of a $100 item. My industry has thin profit margins: the item might have cost me $95 from my distributor, so I make only $3 profit per sale. However typical Bitcoin payment processors like Coinbase or Bitpay only charge 0-1% in fees. So I make $4-5 dollars of profit per sale. This is 33-66% higher profits per sale!