Nasdaq to become a crypto exchange would really take a huge turn of event for holders of tokens. Does it mean google and MS and etc will have its own token on blockchain? This will be awesome. I think its likely to happen when all are going to see its affect when crypto are going to be adopted massively and we'd all see it sooner with XRP. XRP seem like going to widely be known to all through the banks.
I don't think Adena meant that Nasdaq will be going full time crypto exchange. So I don't see Google or Microsfot or any other listed entities to release their own token in blockchain anytime soon. She mentioned about a different wing of Nasdaq to facilitate crypto exchange which would be separate than the current one. Just for information, Ripple is a centralized cryptocurrency controlled by a single company. I would say ETH is the future, if not bitcoin. I don't see Ripple as a worthy contender in any way!