Ehh, colonizing Mars is very important.
Earth won't be enough to sustain the rising population of humans & animals, plus we have to reach another planet before 2100 if we wanna become Type 1 on the Kardashev scale.
Regarding : why India is doing all this space research stuff, it is to claim some share of resources beyond Earth as well. Exploration is important for survival of the hindu race, India is the only big and true hindu country in the world. Christians and Muslims have so many countries. You Christians have 4 continents to yourself (NA, SA, Europe, Australia), this is because of your explorers discovering lands and reaching there to have a share on the resources. Sameway, if USA claims real estate on Mars and other planets then other countries will & should try to claim some for their own as well. These are the reasons why even a 3rd world country like India is into space exploration, if the earth ends in another 60-70 years then we don't wanna perish on earth, our people should also fly to Mars along with the Elon Musk Gang...... Thats why space exploration is very important.