Proof of walk in the green. BitcoinWalk Warsaw: bitcoinwalk.org/warszawa A masterclass in economics, philosophy, ethics, first principles and more. Three is a God's number. Don't you have FOMO, anon? You should. @BitcoinWalk. Join us #EverySat. You'll find the events in @Club Orange and meetup.com. Look out Warsaw! Some waiters and baristas might start asking for fat tips in BTC⚡