The Golden Residence Permit or Golden Residence Visa launched in 2012. It has been the most popular residency scheme to date. The aim is to generate foreign investment through capital and real estate investments. Portugal offers a gateway into Europe and is popular with tourists. The Golden Residence program requires foreign investors to either make an investment into real estate or one of the other investment options in order to qualify for Portuguese permanent residence. Citizenship is possible after 6 years.
Possibly the most important reason you would want to invest is that Portugal has a proven and secure property market with an average property growth of 15% per annum over the last 15 years paired with the government's non-habitual tax scheme offering the best tax option.