Yes, possible with investments simply because it will generate income for you. It also comes in many forms and only depends on what would be more profitable in your end. Well, a good salary will help you with savings but as we all knows savings alone won't last forever. It should be turned to something that could generate money for you if you're after early retirement. Bank savings in most instances could give you interest for a long run however, bankruptcy will also be the threat you won't hope to happen. Depends as well on how you would consume or spend money once you chose to retire 'coz it would be a factor determining how long your money would last or sustain for you. However, I guess this generation won't be settling early given how passionate they are with their professions.