Btc18
In the early morning of January 2, Beijing time, foreign media reported that at the beginning of the new year, the life of bitcoin has been difficult
this is the first time since 2015 that the cryptocurrency has opened a new year in the form of a sharp fall, further aggravating its decline since it hit a record high of $19511 on December 18
The surging trend of 
has given birth to a variety of other cryptocurrencies, and also made bitcoin enter the wall street in the form of futures contracts. On December 18, the Chicago Mercantile Exchange launched for the first time a derivatives agreement that some traders thought would encourage short positions, and bitcoin peaked a few hours later
virtual is always virtual
according to the data of coindesk digital currency trading platform, the price of bitcoin once fell below US $6000 in 18 years, which has dropped by 70% compared with the highest value of US $20000 in 2017
"the price movements we are seeing now may seem drastic, but they are quite normal for this market." Etiro's senior market analyst, MATI Greenspan, wrote in an email to CNBC
with the decline of bitcoin, most digital currencies are affected, and other digital currencies are not much better. Most digital currencies are down by more than 10%. But in the long run, the future of digital currency is worth looking forward to.
as long as the government fails to suppress policies, bitcoin will not become a bubble. According to the coin.love trading platform, the price was less than 50000 yuan. I remember that at the end of June, the price was around 42000 yuan, and it rose by 8000 yuan in less than two months. It is said that the rarity is the most expensive. At present, BTC has become the mainstream currency of digital assets
if the figure below is accurate, the price of bitcoin will rise to US $91000 by 2020
it is this scarcity that makes the price of bitcoin soar all the way in the near future. However, there are different voices about the future development trend of bitcoin and whether it is worth investing
[bitcoin investment is the most risky investment you can make at present]
bitcoin.com is one of the largest bitcoin websites in the world. Due to the soaring price of bitcoin, the website has achieved great development this year. But Emil Oldenburg, its co-founder and chief technology officer, is skeptical about the future of bitcoin
in an interview with breakit, a Swedish technology website, he said: "I would like to say that bitcoin investment is the most risky investment you can make at present. There are extremely high risks in it." "In fact, I recently sold all of my bitcoin in exchange for bitcoin cash," he said Bitcoin cash, a derivative separated from bitcoin in August this year, has recently overtaken Ethernet as the world's second largest cryptocurrency“ When people figure out how bitcoin works, they start selling bitcoin. " Oldenburg once again stressed doubts about the future of the bitcoin“ He doesn't believe that bitcoin will become the kind of everyday currency that the world has always wanted
[if people invest in bitcoin, they are ready to "lose all their money"]
on December 19, according to foreign media reports, the head of a major British financial regulatory agency warned that if people invest in bitcoin, they are ready to "lose all their money". It also shows the opposition of the British financial regulator to the bitcoin. Andrew Bailey, director of the financial market conct authority, told the BBC that neither the central bank nor the government supports "money", so it is not a safe investment
buying bitcoin is similar to gambling and has the same level of risk, he said. "It's not a currency, it's not actually managed in the form of bitcoin," Bailey told Newsnight“ In terms of pricing, it's a very volatile commodity. If you look at what happened this year, I would remind people that we know very little about the price of the bitcoin. This is a strange commodity because the stock is fixed. If you want to invest in bitcoin, you should be prepared to lose money, which will be my serious warning. "
[next year we will see central banks start to hold digital currencies for the first time]
Peter Smith, founder and CEO of blockchain, a cryptocurrency wallet, said that it is expected that central banks around the world will start to hold digital currencies as reserve assets next year, and some central banks may start to issue their own "digital assets"
in an interview with CNBC, Smith said: "I think next year we will see, for the first time, central banks starting to hold digital currencies as part of their balance sheets." Mr Smith said central banks would be likely to buy bitcoin and Ethernet as reserve assets. Central banks now hold gold and foreign exchange reserves to allow them to act in the event of any market shock. The appreciation of bitcoin as an asset may mean that some monetary authorities will have to start holding the digital currency. "Bitcoin is already one of the top 30 currencies in supply, and as prices rise, this trend and the pressure to hold digital currencies as reserve assets will only rise," Smith said This view shows its optimistic attitude towards bitcoin and other digital currencies
as for whether bitcoin is worth investing, we can only say that every investor has his own vision and judgment.
How much is $30000? 190000 RMB
at present, at 17:40 on May 30, bitcoin quoted 48322 yuan, which is about 7520 US dollars
before bitcoin, the peak was $19299. It's 10000 dollars short of your goal
it took nearly 10 months for bitcoin to go from $1000 to $19299 that year. Up 1930%
according to the current market of more than US $7000, if we want to increase this range, US $30000 is certainly OK
but such a good market doesn't happen every time. Those who have made profits before do their best, and the rest are those who have been locked up, unless bitcoin's big good news can drive a batch of fresh blood to buy. It's hard to spend 30000 dollars
I believe the title owner is also a person who plays bitcoin, and I wish you good luck! Maybe $30000
Stars emit light and heat by fusing lighter elements into heavier ones. All kinds of nuclear fusion reactions take place in stars all the time, the most important of which is the reaction of hydrogen fusion to helium
in stars with different mass, the reaction path of hydrogen fusion to helium is also different. In smaller stars, the fusion reaction of hydrogen nuclei takes place through proton proton chain reaction. The process is shown in the figure below
whether it is to split the iron core (fission), or to continue to increase the weight of the iron core (fusion), we need to increase the energy of the iron core. Inside a star, however, there's not enough energy. In this way, the energy generation of the star will stop, and the radiation pressure used to resist gravity will disappear. The star will continue to contract, and the speed of contraction will be faster and faster. Finally, the speed of external matter falling to the iron dominated stellar core will exceed 100000 km / s, but when it reaches the iron core, it will hit an extremely hard "wall", and the speed will instantly drop to zero. The huge kinetic energy will be instantly converted into heat energy, heating the iron core to billions of degrees. The outer layer of the iron core will explode at a very high temperature, exploding the falling material in the outer layer. This process is called "core catastrophe". This is a supernova explosion
at the same time of explosion, under the action of huge energy, a part of iron in the outer layer of iron core will absorb energy and form elements heavier than iron, from 27 element cobalt to 92 element uranium. The iron inside the iron core will press the electrons outside the iron nucleus into the nucleus under the pressure of implosion, and combine with the protons in the nucleus to proce neutrons. All the iron inside is converted into neutrons. When the outer shell is blasted and dissipated into space, the center of the star is exposed and becomes a neutron star with huge mass and small scale
after the stellar matter from hydrogen to uranium dissipates into space, it will mix with the original interstellar matter in space to form interstellar cloud, and form new stars and planets around stars under the gravitational disturbance. This is how our sun and earth came into being. That's how everything on earth except hydrogen and helium comes from
This is the case with nuclear fusion reactions on starswe are all the ashes of a supernova that erupted billions of years ago