Sergej Kotliar is the CEO and founder of Bitrefill. A well-known Bitcoin company that has become one of the most popular places for people to spend their Bitcoin. Bitrefill allows everybody to purchase almost anything with Bitcoin and Lightning using digital coupons, enabling people to deeply integrate into the parallel economy. Sergej is an M.Sc. in Engineering, has been programming since his teenage years, and actively leads product development at Bitrefill.

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Pizza Day Prague 2022 was a one-day international conference marking the 12th anniversary of the first real-world Bitcoin payment. The first edition took place on Saturday, May 21, exactly a day before the anniversary of the legendary transaction, in Paralelní Polis and was subtitled "Just Eat It".

[www.pizzaday.cz]

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Paralelní Polis is a one-­of-­a-­kind nonprofit organization that brings together art, social sciences, and modern technologies. The ideas of liberty, independence, innovative thinking, and development of society are the main underlying foundations the whole project is built upon.

The project intends to remain state-free as it operates entirely without government support. Most of the funds come from voluntary contributions of our donors and partly from commercial activities such as running a unique co­working space and the world’s first bitcoin-­only cafe.

It was founded by members of a contemporary-­art group Ztohoven, and Slovak and Czech hacker­spaces. Its main goal is to promote economic, social, and digital freedom. We try to be a vocal voice of freedom in order to shape the public discourse, and ultimately work towards a freer future.

[www.paralelnipolis.cz]

(From Youtube)