An alien race that has solved the edifice of interstellar travel would have solved every other challenge of their civilization.   They will not need our water or to enslave us or eat us.  You don't travel to another world, just in hopes you can gas up.  Most likely they would be benevolent, thrilled at the MIRACLE  that we are.  Probably a bit dismayed also.  Might back off to behind Jupiter and hit the snooze on their cryo tanks for another 1000 years and then check on us again.,(reply>), Think about Bezos and Elon Musk. Both of these billionaires want to expand space travel.  Space travel is not just for curiosity. It is the next level of conquest for these people.<br><br>The aliens will be looking for expanding their knowledge of the Universe. Also, don't expect the aliens to be friendly. They will experiment on people and possibly enslave people.,(reply>), I believe this as well