For the better, I would suggest, because competition in markets is always a Good ThingTM and there will be plenty more takers waiting in the wings should we see a big player like Nasdaq enter the market. This is just one US company and the world is a big place - did you know that the US is an insignificant 5% of the world's population? - where many opportunities exist for regional services to bloom, catering to local needs. Nasdaq entry will only demonstrate that counter to what many of the financiers have been saying, bitcoin is not a scam. The bankers are frightened. The traders are greedy. They smell blood.If a big player like Nasdaq gets into the crypto industry, it would affect popular crypto exchanges like Binance and Coinbase adversely.
Bring it on.