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What is Bitcoin?

Do you know what's today bitcoin value? Let's answer first the question what's bitcoin is.

If we had to respond to one sentence on the question of what a bitcoin is, we would have chosen the words of Mark Andresen, who in 2014, in a New York Times article, said:

Bitcoin is a revolution comparable to the Internet in the 1990s and PCs in the 1970s.

These are the words of a man who not only has managed one of the most successful venture capital funds in the world for years, but is also a proven visionary largely directly responsible for the Internet, as we know him today.

The article below will only list, without explaining, the basic features of bitcoin. It contains multiple links to other articles on the site that explain in detail how and why the technology works. We hope to serve you as a guide to the technological leap that bitcoin represents for our civilization.

What is bitcoin?
bitcoin is both a global payment system and a currency unit.

Currency bitcoin is not issued and not guaranteed by a government, organization or company. It is supported and defended by tens of thousands of computers worldwide, whose combined power is thousands of times greater than the computing power of Google, Amazon, and IBM combined. The value of a bitcoin is based on this computational power, as well as its benefits, which we will talk about below.

By virtue of a mathematical law, the number of all bitcoin is limited to 21 million bitcoins, and by the year 2017 only a little over 18 million of them have been created. On average every 10 minutes, a new 12.5 bitcoin is being won, distributed among the owners of the computers mentioned above, a process known as bit-digging. Notice that every bitcoin consists of a hundred million satoshi, as they call the pennies of a bitcoin. And that's why - although the cost of a bitcoin is already over $ 17,000 - with a bitcoin, payments of less than one cent may be made.

The bitcoin payment system is a decentralized, peer-to-peer network. We can pay with a bitcoin without the need for intermediaries - no banks, visa and mastercard, paypal, and the like. Fee charges are minimal and do not depend on either the size or the payee. In fact, at bitcoin, state borders do not exist - once turned into a bitcoin, your money is available from anywhere in the world where the internet is.

Your fighters are inviolable - no power can gain access to them unless they have the private key for the address they are in. It may even be said that bitcoin is the first technology in the history of humanity that is stronger than the state and the centralized power in it. That is why many of us are perceiving a bitterly not as a modern currency on the Internet, but as a social resistance to the status quo.

bitcoin payment security is based on public key cryptography, thus avoiding the need to share personal data (such as names, address, card number, etc.) when paying. This traditional cryptography is based on the traditional banking system.

Bitcoin price
Bitcoin price changes dramatically every day. You can see the bitcoin price chart on

New Tools and Design for Facebook

A Chrome extension gives you new functions and layout for Facebook. News feed only, autoscroll, timer, quick links, lights off, new design for Facebook

Facebook Design

fave is an extension for Chrome that adds new functions and makes changes to the layout of Facebook. fave adds new functions like Show Newsfeed Only, Auto Scroll, Timer, Scroll To Top, Quick Links and makes design changes to the layout of Facebook.

The new functions:
- Lights off: hides the left and the rights columns around the News feed on Facebook start page
- Hide/Show News feed: You will not see posts on Facebook home page.
- Quick Links panel on the left side on Facebook.
- Auto Scroll: see all posts of Facebook without scrolling
- Timer: now you can see how much time you spend on Facebook. It displays the time for today and in the past.
- Scroll To Top: creates a button in the bottom right corner that will take you to the top of the page

The Quick Links navigates you to:
- Pages News feed: see news stories only from the Facebook pages you have liked
- Calendar: view all your events and friend's birthdays
- Pictures by Friends: see all friend's pictures from this month
- Groups: all your Facebook groups with indicator for new posts
- Your Friends: list with your Facebook friends and number of unseen posts.
- Live Video Map: watch live videos from the interactive video map
- Weather: pick a location and see the weather forecast
- Messenger: all your Facebook messages in new layout

Layout changes:
- Soft edges
- Font size increase
- Darker colors
- Circle profile images of Facebook users

How to change Facebook layout? The answer is simple - get Fave: tools and new design for Facebook

Earth from Above with Drone Photos

Pictures by Vladislav Terziyski

Drone photography is a solitary hobby that requires a lot of sacrifices. But when you get up in the morning and go out of the tent to the mountain ridge, looking at the red sky and the horizon from which the sun is about to come up, you realize that all this staying in the cold, the long walking and getting up early are worth it.

Aerial Photography Using Paraplanner in Winter


Yavor Michev was attracted to photography long before he enrolled in Ruse University, Bulgaria  in 1993. It became an indispensable part of his daily life.

In 2007 he flew on a motor delta planer for the first time. What he saw during this flight and his passion for photography opened up new horizons and new opportunities for his projects. Since then he has focused all his creative energy and technical skills precisely in this direction.

Yavor prefers to take pictures from a paraplanner or a motor delta planer. To be able to concentrate entirely on the photographic aspect, he usually relies on experienced pilots. In extreme situations professional digital equipment gives him the freedom and confidence to make his wildest dreams come true. So he takes out the best from his camera.

View more winter drone pictures

Artificial Intelligence ​​is just a tool in favour of the people

Veselin Raichev has won multiple prestigious prizes in several national and international competitions in mathematics and science. His love for them comes from an early age, and the most important driving force for him is continuous learning and desire to develop. AI is a tool and nothing more. The tools make people more effective and enable them to work less and live better.

If there is some kind of injustice in this improvement, it’s probably because of the public system, which is the work of others. We, as humans must decline to make the AI ​​more alive than us. The area which I work in connects programming languages ​​and machine self-learning. The goal is to create tools that read a large number of programs and learn how to write new programs. We already have some results – for example, we can predict how a person should name their variables by writing a code through JSNice.

Read more about Artificial Intelligence as a tool

Working for Google

Veselin Raichev has worked as a software engineer for Google, where he has been engaged in Google Maps and Google Translate.

Google employees can use 20% of their time to work on projects that are important to them, that may become important for the company, but are not the main thing they are hired for. For me such project was Google Translate, which I collected data for, trained systems from Bulgarian to English and vice versa, adjusted them and added a module that conjugated words. Google Translate had one of the best teams that I’ve ever worked with. I spent 20% of one year for that, which is not a lot of time, and therefore I have not contributed as much as the people who were creating the whole system.

Read more about working for Google

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