But you don't get any advantage by using bitcoins.
You can get a free credit card, and under conditions, you can have free benefit like he said about insurance...
It depends on the bank, but it might be totally free of charge if he deposits 1000 usd per month in his bank account for instance.
First, as I noted at the end of my previous post, comparing bitcoin and credit cards doesn't make sense. Bitcoin is a currency like dollars or euros. Credit cards are a combination of a credit and a payment system that facilitate the borrowing and paying of any currency a credit card issuer chooses to work with. So if and when bitcoin is more widely used we will see credit card companies allow for transactions in bitcoin just as they do for dollars, euros, yen, and every other currency.
Second, your "free" credit card and all of the other credit card services are not free. The "free" credit cards and the services are paid for by the fees charged to merchants. Every transaction comes with a flat transaction fee (45 cents for example) as well as a "discount" percentage. The discount refers to a percentage that the card issuer is going to take from the transaction. Discount rates that are charged to merchants can range from 2% to 5%. Probably more in some cases. The discount rate is determined in part by the credit worthiness of the card holder, whether the card holder pays an annual fee (it is higher for no-fee cards), whether or not it is a rewards card, and the volume of transactions for the merchant. The merchant has no way of knowing what the discount will be at the time of the transaction. For example, merchants can incur as much as a 4% or 5% "discount" rate for most rewards cards.
Historically credit card companies have forbidden merchants from offering different prices to customers that pay with cash versus those that pay with credit cards. So merchants that take credit cards increase their prices to everyone to make up for these fees. Laws have recently changed (at least in the U.S.) that prevent CC companies from using this restriction, but after 4 years very few merchants have changed their pricing to reflect it.
The net result of credit card pervasiveness is that we all pay 3% to 4% more for nearly everything we buy [edit]regardless of whether or not we use a credit card[/edit]. That money goes to the credit card processors and companies (which are usually lumped into the category of "banks").