Can we live in the underwater city in the future?

I found the article about creating colonies under the sea.

Summary
According to Ian Koblick, there is the technology of building underwater colonies which have a capacity of 100 people today, and it can solve the over-population problems and protect people from natural or man-made disasters. However, it also have some problems about the energy and the water pressures.

Response
Sometimes I hear or watch some news about the Space colonies, although there are few information about the colonies under the sea. So when I found the image of underwater habitations, I am interested in this article. According the article, advocates maintain the underwater colonies could help mitigate over-population problems, or protect people against the possibility of natural or man-made disasters that render land-based human life impossible. It is said that the sea accounts for 70% of the surface of the earth, so I thought it is a nice idea. However, of course, there are some obstacles to create and build the colonies under the sea. For example, we have to gain much energy to operate these colonies and also we have to decrease the bad effects of the water pressures to stay the underwater cities longer than now.

Questions
1. Do you think human beings live in the underwater city in the future?

2. If we can live in the underwater colonies, what do you want to do?