Обрыв космических путешествий

In connection with the preparation in several countries of the flight to Mars, which has already spent billions of dollars for, it makes sense to ask: whether space flights to planets of our star system and supposedly to the inhabited planets of other star systems are possible? and whether these flights in general are necessary?

Any spatial displacement is a search for food and other resources for existence, and also it may be a aspiration for new impressions, knowledge, and the basis for achieving these goals are new contacts, and further these relations.
Therefore, during spatial displacement, a person is looking for opportunities for a better life and for his own kind above all, at this, everything that is dead for him, in essence, does not matter.
At one time, K.E. Tsiolkovsky declared that earthly humanity must populate space.
Apparently, he meant the achievement of the goals mentioned above.
Let's see how fair his declaration.