We may be able to create stable colonies off-planet, and we almost certainly will be able to in 100 years
Earth-dependent outposts, e.g. an ISS on Mars, possibly yes, at great financial expenses and risk for those who would live there. Self-sustaining colonies, no.
Earth-dependent outposts, e.g. an ISS on Mars, possibly yes, at great financial expenses and risk for those who would live there. Self-sustaining colonies, no.