Efficient market theory depends on the assumption that all market participants rationalize information and on average the information that all market participants have is true (though no player has all the right information: for example some have good information some have bad information about a company). Efficient markets also require a group of players who will quickly arbitrage when the possibility of arbitrage (profit without risk).

the average price of each unit of Bitcoin sold for 10,105 US dollars. Bitcoin's own market price is currently 10,031 US dollars. Mt Gox declared bankruptcy in 2014 after they lost 850 thousand Bitcoin units worth 500 million US dollars (about Rp 6.875 billion) due to hacking. Mt Gox then claims to have recovered about 200 thousand units of Bitcoin.

Public Key as this identity. Public key in this case, becomes a new identity that someone can use. While the secret key becomes the secret key associated with the public key. Secret key, only known and used by identity owners only. Technically, someone can use the public key hash as its identity. A message will be verified if it really originates from the person referred to in the identity. So to be able to do it, first is to check whether the public key is indeed and derived from the identity of the person in question. Secondly, the message must have been verified under the public key.

The central bank of Bolivia said in a statement
"It is illegal to use any currency that is not issued and controlled by the government or authorized entities."
Which automatically prohibits the use of Bitcoin and other cryptocurrencies in Bolivia, as they are not official or belong to any particular government of any country.

I think that to replace the national currency will not be possible because the rupiah is the currency of our country's pride and will not also replace the bank because the bank will be a tool for exchange of bitcoin to the rupiah only maybe later as a means of exchange of aja from bitcoin to rupiah.
I'm sure the future bitcoin will be more developed .

The bubble or bubble phenomenon in bitcoin is now beginning to look broken along with the fall of the virtual currency exchange rate when compared with peak period.
But I strongly believe the future bitcoin price will rebound again.

the more advanced and modern Human development then it takes a faster and more efficient transactions and the business world because that's the transaction of money and goods more quickly.
Barter
the first financial system is to barter, ie trade goods or services for other goods or services. For example a farmer needs clothing, he can exchange rice that he has with clothes.
Fractional reserve receipt money
Over time the Bank's safe became full of commodities. The swords are more comfortable in claiming, and rarely use their silver gold commodities stored in the Bank. Then came the idea to make a claim check (money receipt) which then loaned. When someone needs a loan, the bank makes another claim check along with the interest. Banks do not need their own money to make money.

Up to now, consolidating between $ 7,900 to $ 8,400. A break will send us to test the strong $ 9 resistance level. From the bear side, breaking the $ 7,900-8,000 support will send us to the next level in the $ 7,500 area.
Hopefully the future bitcoin price will reach $ 20.

If I choose a short-term investment. Because the other advantage of short-term investments is that you can get substantial results. With this type of investment, you can often realize good results after only a very short time. Then you sell security to lock your profits and look for something else to put in money.

My prediction of future bitcoin.
Bitcoin prospects are a promising long-term prospect. bitcoin prices in the early to mid-2018 will reach more than $ 6,000. He also predicts that Bitcoin prices will continue to rise up to $ 25,000 by 2022.
He believes that several factors will cause Bitcoin to rise to more than $ 6,000. One of them is the increase in public adoption in the use of Bitcoin as a store of wealth and financial investment by 50%. Lee said "We see Bitcoin successfully securing institutional licenses and improving transaction platforms, so that public adaptability is greater.

What to watch for when using bitcoin.
If there is an offer to increase Bitcoin quickly, do not be easily attracted because it is very vulnerable to Bitcoin fraud. All you need to remember is that there is no business that is gained instantly.

in Bitcoin transactions it is difficult to embed consumer protection laws in them. Bitcoin can be observed from two sides, namely as a commodity invested (as well as gold) or as a means of payment in transactions. Law No. 8 of 1999 on Consumer Protection states that a protected consumer is an end consumer. So, investors are not the final consumer.

The cryptocurrency market has struggled to show signs of strong short-term recovery. Analysts have stated among the $ 11,000 range as the ideal position to start a strong rally for the medium term. However, the market has failed to maintain its momentum throughout March, and is likely to continue to fluctuate due to its low daily trading volume in the coming days. And this greatly affects the selling point of cryptocurrency.

According to what I know of Bitcoin law as a medium of exchange is a mubah (allowable) for those who are willing to use and acknowledge it.
But the law of Bitcoin as an investment becomes haram because in fact Bitcoin is treated as a means of speculation.

I think blockchain is undoubtedly credibility and safety. Owned by BLOCKCHAIN ​​one of the best in providing the facilities needed by Bitcoin users.
Blockchain has served Bitcoin users from various countries around the world, and the transaction has already reached millions of dollars.
Online Bitcoin wallet security provided by Blockchain.info becomes a high priority for its customers to stay comfortable and quietly storing Bitcoin in Blockchain.

I think MetaMask is a safe safe, where the user interface for managing identities on various sites and marking blockchain deals. Everyone can now install the MetaMask add-on in Chrome browser, Firefox, Opera, and Brave browser.

According to my prediction Digital currency will change the monopoly of currency that is by the government of a country, just like the internet that changed the monopoly practice in the phone industry.
There will be new government agencies created to analyze the regulation of digital currency.

Russia's Supreme Court has effectively overturned the decision to ban access to the Bitcoininfo.ru website, after a popular Russian portal containing information and news related to crypto. The ruling sets a precedent for more than 40 sites with similar content removed by Russian authorities over the past few years.

Indeed mid-2018 bitcoin market prices dropped dratis and do not know when it will return to normal again.
I hope hopefully later this year the bitcoin price will come back again.

The launch of bitcoin futures gives legitimacy over the criptocurrency in the eyes of institutional investors. Bitcoin will also gain second legitimacy after CME Group launches its own bitcoin futures next week.
Until now, bitcoin has been widely owned and traded by a number of entrepreneurs.
"The introduction of financial instruments provides the necessary market structure for institutions to allocate to cryptocurrency, which is a short-term and long-term positive,