Whats the point of using bitcoins?

fast, easy, anonymous, and overall pretty secure.

Sometimes when you buy stuff the seller has to worry that you're going to fraud them or do a chargeback, when you offer to pay with BTC they know their money is safe so they tend to deal with you much faster, take you more seriously, and you can usually get a discount. With wallets like coinbase and circle adding and moving money from paypal, bank account, and credit/debit cards is very fast and easy for you as the buyer.