Nasdaq is one of the most innovative companies around and they don't want just standing by as the world of cryptocurrency is doing its parade spewing profits as it passes by. These people are aware of the marketplace and they know there is a big money that can be made in cryptocurrency exchange. They just have to look at Binance to see how good is this new industry. And I believe it is not just Nasdaq that is thinking of the same...there are now many other stock exchanges in other parts of the world that are already planning to put up a separate division to handle cryptocurrency. This is telling us that cryptocurrency market is already here to stay...there can be some "violent" changes as months are rolling by but the industry will withstand those changes and can easily be adoptive.
They knew that cryptocurrency trading is getting popular so they don't want to miss the money that will be earned from here. Some of the regulated exchanges are already offering crypto trading so for them to offer it is a good move to be not left behind. Eventually, other countries with their own local stock exchanges would offer crypto trading as an alternative to stocks. Crypto trading then would be regulated because traders need to do KYC the same as trading with stocks but this is to be expected as more people and institutions wants to get involved with it and they just want to protect the traders and investors. As what you said, we have to be ready to violent changes but aren't we already at a violent stage now?
I guess crypto is just too hard to resist. This is a good thing though. It's an indication that the winds are shifting in favor of the the cryptos. Them adapting, means that survival means accepting acknowledging cryptos. Additionally, more exchanges means more competitive prices! hopefully.
We are on our way to mass adoption which is good news because eventually cryptocurrencies would be use for their actual use as more people join. Bitcoin then may find its stability and will be use more as payment option rather than an investment.