I think it is all of the above, what you mentioned. Crypto should lead to the better society, not more anarchy.
At the same time, crypto still provides a chance to be private, should you wish to do so

Digital currency must be the future trend, which is an interstellar currency, is the future-oriented currency. The reason why many people do not understand it is because we have not moved from interstellar civilization to interstellar civilization. I doubt very much that some of those who question Bitcoin as a scam have carefully read the white paper (even if they do not understand it) and are hardworking about bitcoin. There is no need to discuss advanced mathematics with the primitives. When humans have established colonial power among the various planets, have you let them use the dollar euro earth currency? Different planets have different elements of resources, what things to use as a general equivalent? Who will be the central bank between the planets? anyway. Bitcoin is a digital currency, but can existing Bitcoin be the digital currency in the above text? At present, it is not possible to do so. In particular, nowadays all kinds of fragmented bifurcation and interest group games make me feel very sleepy. In addition, the restrictions on the total volume do not accord with the laws of human nature and economic development. Some legal coins are indeed too bottomless, but is the deflationary currency really good? This is bitcoin attractive place, but it will also be his flawed. When discussing digital currencies, we need "generic equivalents," not collectibles. At present, different countries have different attitudes toward digital currencies and are mainly determined by their national conditions. Countries that support or allow digital currencies are mostly countries that freely convert their capital into and out of circulation, such as Japan. Most countries that restrict or even oppose Bitcoins have foreign exchange controls, and capital can not freely circulate. The bitcoin is simply outdated. Originally, the best regulatory approach is to kill the private digital currency exchange, engage in ZF Direct, or require all private exchanges have access to ZF platform. Put a thing that has been decentralized into a centralized one. Then full real name certification, financial supervision. Just like the Shanghai Stock Exchange, like the Shenzhen Stock Exchange, so afraid of what extrajudicial. But now look, that is, just think about it.

Digitization is a trend in the future, but digitization does not represent a solution to Bitcoin. Governments are more likely to set a centralized digital currency scheme under the direction of the central bank, using technology as a tool to transform existing currencies rather than accepting an unsupervised currency. This global currency means that countries should abandon monetary sovereignty and lose part of their ability to regulate the economy. They should learn from the crisis of the Euro and the European debt crisis and give up monetary sovereignty is hard to accept for the big powers. In fact, Bitcoin could die before dawn if there is a day when the world uses the same kind of digital currency.

Bitcoin is really flawed now. You use these flaws to infer that he can not become a world currency.
 Why not? But many people overlook one important point: Bitcoin is going to evolve. He is not the immutable thing, the core.
Is a global unity, this is indeed a contradiction with national boundaries so other features of Bitcoin are used to temporarily make up for this contradiction and indeed reached a certain consensus and continue to spread why bitcoin is a totally worthless thing Trust can get so many people start to have the point of the currency attributes? The core reason is not that people do not trust the government to spam banknotes, but that they need a unified currency in a world where countries trade with the rest of the world. I want to buy Japanese products, you do not support the RMB ah, trouble, if we all use the same, I can easily buy all kinds of goods in various countries, then the world's commercial development economy will enter a landmark golden age, and finally may lead to the world Uniform government unified law, the great unity of the peoples of the world! This is the result of the development of productive forces. Borders will be crushed slowly in frequent transactions. Opening up is kingly. The unification of currencies is a good start! Anonymous problems, the regulation is not enough, the number is too small can continue to improve the evolution of bifurcation to match the status quo, it is alive and will continue to move closer to the world currency, not a developer decision, not a miners decision, This thing is decided by the development of the entire world.

Like the Internet, the blockchain will be the future of Bitcoin and virtual currency, a technology that determines the future, not a technology's product

I think the future of bitcoin and other cryptocurrencies will be good, and bitcoin's value will rise as everyone's focus is slowly on the bitcoin world. A lot of money to join will speed up the development of cryptocurrency world, technology will be continuously improved, you can progress faster.

Nobody knows the future. But now one thing is clear: the crypto market is changing the world economy. The governments and banks understood the danger of crypto currency, and began to struggle with it.

As of the current state of cryptocurrency, Im afraid they cannot replace the credit card.  There might have some trying to but it seems it does not work the way they wanted it.  Cryptocurrency still needs a lot to improve in order to replace the services OP was talking about.  And this also needs government regulations since they will never do those stuff without the permit of government because if they do, they will be accused of not following the law.

All the things you said here can possibly happen. And also, things like bitcoin getting banned from all countries and countries accepting it can also be considered. Payments through bitcoins, credit cards for bitcoins, might exist as well.

Bitcoin is the first cryptocurrency which has mass adoption and so there is high potential for this cryptocurrency to grow which can improve the world economy, another use of bitcoin is trading can be done without revealing the identity of a person and anyone involved with internet can start up with bitcoin network technology. The bitcoin network has its own protocol of 21 million bitcoins which can be created by miners but these coins can be divided into smaller units, the smallest unit of bitcoin is known as "satoshi ". Bitcoin is a revolutionary technology as it can transfer funds immediately and safely without a central authority this digitized form of currency has the potential to expand the global commerce and transform businesses as bitcoin can be transferred easily with low transaction fees.