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We are ~20 hackers from Bity and the crypto-currencies community around Switzerland to be willing to come. As you know last year we organised https://events.ccc.de/congress/2017/wiki/index.php/Assembly:Crypto_Currencies I emailed CCC tickets department to get vouchers, but they asked to contact a local hackerspace. So here we are. As you know most of us are attending usually via Fixme or Will's group. Now we are even more to participate and will need a total of approximately 20 vouchers. We will bring lot of activities around crypto.