RT: Announcing educator and inventor, Ben Arc, as a Bitcoin Amsterdam speaker!
@arcbtc is a #Bitcoin and Free Open Source Software (FOSS) hobbyist, advocate, educator, researcher and inventor. He has created many DIY bitcoin hardware projects and workshops. https://t.co/nEy9tx6jEu
RT：宣布教育家和发明家BenArc成为比特币阿姆斯特丹发言人！
@arcbtc是一位比特币和自由开源软件（FOSS）爱好者、倡导者、教育家、研究者和发明家。他创建了许多DIY比特币硬件项目和研讨会。https://t.co/nEy9tx6jEu