The situation in Russia is constantly changing, as is the opinion of its politicians and senior officials. Yesterday Russia recognized the existence of two independent republics on the territory of Ukraine and has already openly sent its troops there. It's practically an open war. And Europe and the United States in this case pledged to introduce hellish sanctions against Russia, which have never been introduced before. In particular, Russia will be cut off from being able to use the dollar and the euro. Therefore, now is the time for Russia to use bitcoin and other cryptocurrencies.

In Russia, there is still a dispute between the position of the Central Bank, which wants to completely ban the mining of cryptocurrency and its circulation in the country, and the Ministry of Finance, where they want to legalize and regulate cryptocurrency, and legalize it as a means of payment, which is not yet in Russia.
I don’t know if they will pay attention to cryptocurrency in the near future, since Putin today recognized part of the occupied territory of Ukraine as two independent republics and, through a cooperation agreement with them, will officially send troops. The world is really on the verge of a third world war, and Russia as a state may soon disappear.

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Already, various sources have reported that Zuckerberg sold his rights to Diem's intellectual property and other assets to Silvergate Capital Corporation for a total of $182 million. Therefore, it is hardly worth considering the Diem stablecoin project dead. It looks like he will soon be reanimated and begin a second life. True, this time he will definitely have nothing to do with Facebook.

Earlier on this forum, some argued that quantum computers will not be created, and if they are created, they will never reach the power to crack the security codes of cryptocurrencies. A little time passed and quantum computers became a reality, and experts expect ten years to achieve such power, and even then this is in the worst case. We cannot wait for this time to expire, for then it will be too late to defend ourselves. It must also be taken into account that technological progress does not stand still and ways can be found that will significantly accelerate the growth in the power of these computers. It is better to play it safe than to lose this market later.

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Bitcoin does not die if, for some reason, access to it becomes impossible. It remains on the blockchain and will wait until access to it is resumed. In the future, quantum computers may be able to do this, the capabilities of which have been growing quite rapidly lately, but this will most likely happen in at least a decade.
Due to the death of bitcoin holders and for other reasons, the number of lost bitcoins will constantly increase and there is nothing we can do about it. After all, we ourselves are banks for our cryptocurrency and are fully responsible for its safety.

The topic of quantum computers and the possibility of their calculations is of interest to many with its ability to hack into our cryptocurrency wallets. I recently read an interesting piece of information that claims that if this happens, it won't be anytime soon. Unfortunately, I cannot link to this information.
So it says the following:

Why do you need a quantum computer to hack wallets?
Every bitcoin transaction must be “confirmed” by a network of miners before it can be added to the blockchain, a ledger of who owns what. Each transaction is assigned a cryptographic key during this confirmation process, and breaking it allows you to appropriate bitcoins. The sheer power required to perform these calculations is what keeps cryptocurrency wallets secure.

While this energy-intensive process makes code-breaking nearly impossible for conventional computers, quantum machines are expected to be orders of magnitude more powerful. What's more, several companies, including Google and IBM, are already claiming quantum supremacy, a term that refers to calculations that would take a classical computer thousands of years to complete.

What is needed for hacking?
These recent breakthroughs in quantum computing have prompted scientists to explore whether quantum computers can break the blockchain. “Once a bitcoin transaction is announced, there is a key associated with it,” explains the author of the study in a NewScientist report. “And there is a window of time during which this key is vulnerable. It varies, but usually it is from 10 minutes to an hour, a maximum of a day.”

Webber and his team calculated that it would take a quantum computer with 1.9 billion qubits to break the bitcoin code within that 10-minute window. It would take 317 million qubits to hack it in an hour, and 13 million qubits would be needed to hack it in a day. At the same time, IBM's record-breaking superconducting quantum computer has only 127 qubits. To crack the algorithm that protects bitcoin, it must be a million times larger.

What is the result?
In summary, the requirement for a large physical qubit means that bitcoin will be protected from quantum computing attacks possibly within the next ten years, the scientists note in an article published in the journal AVS Quantum Science. While this is reassuring for bitcoin holders, it also highlights the possibility that huge bitcoin fortunes could become vulnerable in the not-too-distant future.

However, IBM aims to have a 1,000-qubit quantum computing chip called Condor by 2024. And by 2029, Google plans to conquer the milestone of a million qubits. The pace of quantum computing innovation is hard to predict, but you can bet bitcoin that hackers will keep an eye on the latest developments.

Today I saw on TV news with reference to the words of Russian President Putin that Russia is not afraid of being cut off from the SWIFT international banking system, since there is a good currency, the yuan. It is possible that Putin even has in mind the digitized yuan, which China promises to officially launch by the opening of the Winter Olympic Games in Beijing, that is, on February 04. I think that this is a significant exaggeration of his capabilities on the part of Putin, and he is still afraid of being cut off from SWIFT, but they deliberately deny the negative consequences of current and future international sanctions. But surely in Russia they will not turn to bitcoin or any other decentralized currency in order to circumvent international sanctions. The Chinese digitized yuan is more suitable for this. But for certain operations, the Russian government may well use bitcoin.

Not all new technologies are related to finance. And there are no new directions in the financial sphere yet. Therefore, for now, fears for cryptocurrency are unnecessary here. Cryptocurrency has just begun to develop and it does it quite quickly. It looks like it still has a lot of potential for use.
As for technologies such as quantum computing, there are different opinions in this regard, including those that are not entirely pleasant for cryptocurrency. Quantum computers have already appeared and their power is growing. Theoretically, there is a danger to the existence of cryptocurrency, but no one knows what will happen in practice.

The main thing is that, apparently, we will never know who was hiding under the pseudonym Satoshi Nakamoto. Assumptions and conjectures will remain so and will not add anything to the mystery of the creator of bitcoin. The creator of bitcoin hid his identity well and most of the participants in this market agree that it will be better for bitcoin and cryptocurrency in general.
Elon Musk's speculation about the possible identity of Satoshi Nakamoto does nothing to bring us closer to unraveling this mystery. Let this remain a secret.

Here they write that El Salvador has a debt to the IMF in the amount of 287 million dollars. I am sure that this is an old debt and it arose or increased even before the adoption of bitcoin as a national payment currency. Now, if the government of El Salvador does not sell his bitcoins at the current low price, then he will not have financial problems. Of course, the world has not yet known such an experience, and the whole world is watching how the economy of El Salvador will behave in the face of falling Bitcoin prices.

In the question of the necessity and usefulness of cryptocurrencies, it is necessary to distinguish between such usefulness and necessity for the state and its government, as well as for citizens. For citizens, of course, cryptocurrency provides new opportunities and is very useful. I hope that over time, people's interest in cryptocurrency will only increase and its need will grow. But for the state and its government, cryptocurrency creates more problems and is minimally useful for them, but not necessary. States will not widely use cryptocurrency. On the contrary, they will try to regulate its circulation in the country as much as possible.

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Whether it’s a bear market or it’s just a deep correction, however, for several months now, the cryptocurrency has fallen sharply in price and is practically standing still. Moreover, this happened in the last two months of the year, when traditionally prices, on the contrary, always grow significantly in price. Now I think that we are expecting a rise in prices in this market, but not now, but after some time: maybe another month or two will pass. However, growth is bound to happen.

Such problems have existed in every generation, but nevertheless, humanity on this planet has been greatly increasing in numbers lately. True, in developed countries there is indeed a significant decline in the birth rate. Added to all the problems is the problem of drastic climate change, which will lead to large migrations of people, the problem of food and especially drinking water.
We, of course, hope to solve a significant part of these problems by accumulating cryptocurrency, which can solve our financial and material problems in the future.

From a legal point of view, barter transactions are actually an exchange agreement, that is, a type of civil law agreement in which one party undertakes to transfer some property to the other party against the obligation of the other party to transfer property of equal value to the first (from the point of view of the parties to the agreement). With barter, you still need to evaluate the value of the goods on both sides, and the currency of states does this well. That is, all the same, we turn to fiat in a barter transaction. At the level of a decent business, this is a very risky deal. In general, a return to barter is a return to the Stone Age.

Money and happiness are, of course, very closely related. We live in the material world and in order for us to feel satisfaction in this life, we need to provide the needs of our body with certain material goods. But happiness cannot be bought with money, or replaced by money. An excess of material wealth does not add happiness. On the contrary, very often there are cases when too rich people get fed up with life and commit suicide.

I think that this is not quite true, as the author of the topic claims. Cryptocurrency is not always profitable when held. So, almost all tokens that were created in 2017-2019, even regardless of their prospects for growth and development, after a long bear market, no longer rose in price and for the most part left the market. It is still profitable to keep the cryptocurrency in a high level of capitalization. So, over the past two years, bitcoin has grown in price by 6 times, ethereum by 25 times. But the cryptocurrency market remains very unpredictable. Therefore, what is profitable now may lose its relevance in the future.