Colonization is the only way for humanity to move away from a dying planet. Earth is dying and in a fast and unrecoverable pace. We have the technology to make a moon base or even begin colonization of the satellite; so we should! While colonization has had pretty bad effects in the past, There's no need to protest against exterminating or subjugating native populations because there are no native populations on the Moon, Mars, Jupiter, Etc. Plus, It would provide Humanity with so many more resources! We wouldn't need to worry about running out of them on Earth. If we need more, We can always just colonize another planet. Plus, Overpopulation wouldn't be a problem. We have so many planets that can fit 5 to 10 billion people on them each, Maybe even more with larger planets. Colonization is the right step forward.
Its best for our survival. Climate change and nuclear weapons are putting us at risk of extinction, So colonising another planet or moon would be the sensible option. About 50 - 60 kilometers above Venus' surface is where temperatures and air pressure resembles Earth (think Cloud City from The Empire Strikes Back). The Moon is close enough for regular trips so long-term habitation shouldn't be a worry. Mars, While it has a thin and CO2 atmosphere, Does have water ice underneath its surface. For both Mars and the Moon, You could build the colonies underground to protect yourself from radiation. Gravity would be a big issue though.
The colonists should be in charge of the colonies. Even if America or China tried to claim the colonies as territory, The colonies would eventually want to be independent from Earth.
Earth is the only planet in our solar system that has a suitable atmosphere. And we don't have the technology to reach extrasolar planets in a short time period, Even if they had a breathable atmosphere. And on the chance we were to reach a habitable planet outside our solar system, If there was sentient life on that planet, Colonization would be morally wrong. History has shown the consequences of colonization; European settlers arriving in America between the 15th and 19th century found themselves competing with the indigenous population, And that competition turned to exterminating and/or subjugating the natives. We should focus our resources and energy into preserving Earth.
Instead of using up our resources to colonize other planets, We should first create weapons of mass-destruction to establish a despot to rule the world. Then, We should make portals leading to the anime world which is FAR better than colonizing mere planets. After that, The next goal should be to determine who should be the king of the pirates and how to share the one piece and to also find a decent Hokage who is neither Boruto nor Sarada.