Is There a Decentralized Data Base Under Crypto?

I'm very, definitely interested in the use cases of what's the distributed data base underneath crypto. And then on the currency side, my own feeling is that a nation states are going to find it very hard for just some decentralized intra structure to completely take over. Ea, terry coage, lomo parkers, a question about advertising. As cara mentioned, you've had sort of fits and starts with businesses in and around advertisin,. That was back when advertising was more of an art. To day, it's much more science, right? You've got a, it's a trillion dollar global industry. So i guess my question is, might that change pur your