The private company Spacex is getting ready to move the passengers from Earth to Moon by the year 2025 and also he mentioned that they will move 1 Million people to Mars and create the first civilization of Mars along with himself.
Do you believe this will become possible in the next five year? Or just a sci-fiction story!
In 5 years i don't think so. Perhaps you mean the first humans ever stepping on Mars, and perhaps they could set up a small base, but that is still far away from the plan of moving
a million...
How would humans develop and adapt to the lower gravity for long periods? Also living indoors, possibly underground years and decades, rarely ever going out in full space like suits? And what kind of people would want to live there and even pay for the ticket themselves? How would they earn their living there?
No its not impossible, but i don't think it will be that big. Living on Mars won't be too different than living in a space station. And if a serious terraforming project ever starts, it would take centuries to develop.
Remember, Elon's intention is only to provide the transport service, he expects the people that goes there to solve the rest. He is thinking the Railroad conquest of the west era, he wants to build the railroad and operate the trains and stations, nothing more. He doesn't even want to go there himself.
Having the capacity to move a million, is possible, but i doubt the demand would come. What could possibly drive that many humans to move there? Oh and 40 minutes lag, you are not going to like the internet much...
But perhaps that business will finance SpaceX to then build a (proper) Space Station (with artificial gravity, such as O'neil tube or such).