I think so? No. Scientists think so. There are no human missions being seriously planned right now. Just a bunch of dreamers. It is likely no one can afford what it would cost to send a human to Mars safely. Not for a long time.
Habitable? That is far beyond what we are currently capable of. Heck, we're not even capable of sending someone to Mars now. Until it has been done it is all theoretical. A craft would have to be built unlike anything that has ever been built before.
The only reference we have right now is the ISS, which is inadequate for such a mission. It cost over 150 billion USD to build. A craft that can carry humans to Mars would cost several times that. Possibly a trillion dollars?
It is interesting to note that we never fly humans in the first of any new craft we ever build either. So we would likely build more than one Mars capable spaceship, before we put anyone on one.
Flying humans to Mars is a colossal undertaking where many do not fully appreciate the magnitude of the task.