Bitcoin, a moeda na era digital.
https://rumble.com/v4wefeo-bitcoin-a-moeda-na-era-digital-de-fernando-ulrich-parte-1.html
https://rumble.com/v4weib0-bitcoin-a-moeda-na-era-digital-de-fernando-ulrich-parte-2.html
https://rumble.com/v4weoef-bitcoin-a-moeda-na-era-digital-de-fernando-ulrich-parte-final.html