i think that the colonization of the Jovian and later Saturnian moons would be a better option then the colonization of Mars firstly it’s much easier to transport stuff from a Moon then an Atmospheric planet which allows for faster orbital and surface infrastructure to develop secondly there are a lot of eggs around jupiter and saturn Allowing for multiple Colonies to exist and if one of them goes extinct the others can survive thirdly it has economic benefit due to the Moons being well Moons with lots of volatiles in the far future we can build large freigthers to carry the various minerals towards earth to either use them in cislunar space or in earth itself