It is the possibility of obtaining a legal residency permit in another country through an investment approved by local legislation, while maintaining your original nationality.
It depends on the program. Some require effective minimum stay; others, such as certain European programs, do not require continuous effective residency.
It depends on the country and the type of permit obtained — some programs include the right to work, others do not. This aspect is detailed on each country page.
Yes, in most programs, subject to the family eligibility criteria of each country (see Family section).
It varies by country and program, ranging from a few months to more than a year—see the estimated duration on each country page.
In many residency programs, yes, after a legal period of stay and fulfillment of the applicable naturalization requirements.