I am ready to bet that life does exist in some form and somewhere on other planets. The sheer number of planets and galaxies that exist is a very probable source for speculation of planets which can support life. Its really nearly impossible to estimate the extent and amount of the universe and planets. But I would not bet whether there is intelligent lifeforms like human beings on other planets or not.
And I am sure that life from earth will travel space in future. My theory is that it would be possible to create androids and robots that would be controlled by neurons, so it would be possible to transplant a brain from a human into a robot which will be the new body for the brain, and the brain is the sole personality. Then it would be absolutely possible for that being to travel the space with less complications, than that are experienced by a human body. Many of the functions of brain would be taken over by the CHIPS and advanced software. And the brain would get much more complicated than now. I envision many such Androids travelling space, seeking knowledge and experience for the humanity. If such technology was available today the I would have happily volunteered for it.LOL. But it is going to happen soon.