Is financial transaction through a block chain better than using a credit card?

I wondered if the block chain would greatly improve the modern financial system.
From the conclusion, I think that the probability of success is not very high.
With decentralization, the block chain and the crytocurrency have made many improvements, but the block chain has yet to capture the weaknesses of the modern financial system, or to surpass it.
Many users use crytocurrency for transnational transactions between individuals, but the government's efforts have lowered usability than thought.
Since then, those who support the development of crytocurrency and block chains believe that systems such as ripple will replace existing systems by providing faster and cheaper financial services.
In particular, the ripple price has surged over the last few days, as shown in the chart below, due to efforts before ripple development.

The reasons why I think that financial transactions through block chains will not become popular are as follows.

1. There is no incentive to replace the existing system.
   Since the existing financial system has already been fully developed, it is difficult to feel the need for faster financial transactions by introducing a block chain.
   Of course, financial companies will benefit from the introduction of a block chain, but users will feel that using a block chain is not much different than using a conventional credit card.
   Borrowing from the concept of principle of economics, it means that the benefit of introducing a block chain will not outweigh the cost of that.

2. Even if a block chain is introduced, it is not superior in cost.
   Taking an example of a public block chain instead of a private block chain, the cost of operating a block chain of bit coins (electricity, hardware, etc.) does not differ significantly from the cost of a Visa or MasterCard.
   If the costs are similar, you will have to deal with more transactions at the same time, but the block chain is not.
   At the time when Exchange's premium in Korea exceeded 50% last year, transactions were often delayed due to the transaction fee of the block chain.
   In this situation, it is difficult to manage the block chain easily.

3. From the government's point of view, there is enough incentive to oppose it because it is difficult to capture transactions across legal boundaries, even if all transactions remain in the block chain.
   A variety of new crimes using crytocurrency occurred last year, it is not easy for the government to supervise them.
   For example, if you store money in a foreign exchange and buy millions of dollars in products from an electronics store like Big Camera in Japan, the system that automatically reports to the government at the time of payment of over $ 600 will be useless.

So what will the future of the block chain and crytocurrency be?
As it is often said, 95% of the crytocurrency will disappear, but only 5% will succeed.
What are these 5% block chains?

I think that the current top 10 crytocurrency will continue to play its role because it has been positioned to users as a means of storing value.
In other words, it will be maintained as an investment target.

Among the remaining crytocurrency and block chains, I believe that companies that already belong to a platform that has already attracted enough users, such as Steemit, which we are looking at, or who provide services to companies or governments under a private block chain, will survive.
It might be better to invest in a company that has some commercialized block chain.