Martijn Wismeijer, also widely known as Mr. Bitcoin, is a Dutch Bitcoin entrepreneur, biohacker, Bitcoin ATM operator, and recurring panelist on The Bitcoin Group, the long-running weekly news panel produced by the World Crypto Network (WCN). He appeared on The Bitcoin Group across approximately 40 episodes spanning episode #226 through episode #356, establishing himself as one of the show's most internationally recognized contributors. He is the founder of Mr Bitcoin, a company specializing in the installation and operation of Bitcoin ATMs across Europe, and achieved worldwide media prominence in 2014 after implanting NFC chips in both hands to store Bitcoin private keys — a feat he described as "the Holy Grail of contactless payments."
By the numbers: 48 Bitcoin Group appearances on record; 15 graded up/down predictions on the predictions chart (61.5% accuracy across 8 correct / 5 wrong / 0 abstain).
Sources: tbg-mirrors/guests.json appearance log; curio-wiki article (canonical intro adapted); predictions-v3/data.json leaderboard. See backlinks below for every page on 1n2.org that references this entity.
→ Full prediction log: /predictions-v3/guests/martin-wismeijer.html
48 episodes: #226, #229, #232, #234, #241, #242, #245, #249, #250, #252, #253, #257, #258, #259, #265, #267, #271, #273, #280, #284, #285, #286, #287, #288, #290, #291, #292, #293, #299, #300, #301, #303, #304, #305, #314, #316, #320, #323, #324, #326, #330, #331, #337, #343, #346, #349, #354, #356
→ See TBG Timeline for the full lane chart.