Its a tough question about privacy coin, from one side people, has right for the privacy of their fund, from there another side a lot of criminal use privacy coin to make their dirty things. I think in future you will only be able to buy privacy coin on the decentralized exchange
I think that decentralized exchanges will be, but still, the biggest part of the people will trade on centralized exchanges. and privacy is important, but its just as important to remove the use of cryptocurrencies from the black market