Virtual currency HBT

1. Hello, it's OK to invest in bitcoin, and everything else will return to zero.
bitcoin is completely decentralized. Without an issuing institution, it's impossible to manipulate the number of issues. Its distribution and circulation are realized through open-source P2P algorithm

anonymity, tax exemption and supervision free

robustness. Bitcoin is completely dependent on P2P network and has no distribution center, so it cannot be shut down externally. Bitcoin price may fluctuate and collapse, and many governments may declare it illegal, but bitcoin and its huge P2P network will not disappear

cross border. Cross border remittance will go through layers of exchange control agencies, and the transaction records will be recorded by many parties. But if you trade with bitcoin, enter the digital address directly, click the mouse and wait for the P2P network to confirm the transaction, a lot of money will pass. It does not go through any regulatory agencies and will not leave any cross-border transaction records

it is difficult for the cat to survive. Because bitcoin algorithm is completely open source, anyone can download the source code, modify some parameters, recompile, and create a new P2P currency. But these counterfeit currencies are fragile and vulnerable to 51% attacks. Any indivial or organization, as long as it controls 51% of the computing power of a P2P currency network, can manipulate transactions and currency value at will, which will be a devastating blow to P2P currency. Many Shanzhai coins die in this link. The bitcoin network is robust enough. If you want to control 51% of the computing power of the bitcoin network, the number of CPUs / GPUs required will be astronomical.

2. This still depends on the resources. Professional mining machines are very profitable, and ordinary mining machines may be suspended. Look at the flow of ore mining, we know that the super miner's income is more cattle.

3.

Although you use a foreign currency card, it is still priced in local currency. That is to say, when you use a single visa card, you still use RMB

when using visa credit card in China, visa organization will first convert RMB into US dollars after receiving the RMB payment request and charge it into the cardholder's US dollar account, and then need to purchase US dollars in RMB for repayment

therefore, although visa credit card can be used in China, it is not cost-effective. Using visa credit card in domestic consumption will face two losses:

1. Currency conversion fee: 1% - 2% of currency conversion fee should be paid

Exchange rate conversion fee: the exchange rate difference between RMB and US dollar

extended information:

visa was listed on the New York Stock Exchange (NYSE) in 2008, and became the largest IPO in the history of the United States with a financing amount of US $19.7 billion, with the stock trading code of "V"; As of December 31, 2008, debit card transactions in the United States exceeded credit card transactions for the first time

visa card can be accepted at more than 29 million merchant transaction points all over the world, and can withdraw cash service from 1.8 million ATMs, with unlimited convenience. There are more than 1.85 billion visa cards in circulation worldwide, which proves that visa is the most popular payment brand. Visa offers a wide range of credit and debit procts to meet all kinds of payment and living needs

Network visa card