B21 Block: Cryptocurrency & Blockchain School

With so many alt-coins out there, how does one decide which ones are worthy of attention? Some alt-coins attempt to achieve broad distribution and use as currencies. Others are laboratories for experimenting on different features and monetary models. Many are just get-rich-quick schemes by their creators. To evaluate alt-coins I look at their defining characteristics and their market metrics. // Excerpt From //Mastering Bitcoin, 2nd Edition, By Andreas M. Antonopoulos.CC-BY-SA// Join Binance //Join: http://bit.ly/2Hji5nQ// B21 BLOCK: CRYPTOCURRENCY & BLOCKCHAIN SCHOOL //Free Trial: https://www.b21block.com// ABOUT US //B21 Block is an online cryptocurrency & blockchain school, and since 2015 has been focussed on creating the highest quality educational products, on cryptocurrency and blockchain technology. We're here to help you join the cryptocurrency & blockchain ecosystem!// SOCIAL //Youtube: https://youtube.com/c/RavinderDeolB21Block?sub_confirmation=1Facebook: https://www.youtube.com/red