Nobody would chose to sacrifice themselves and their descendants (because that's what such an expedition is about), for mere curiosity. And nobody would fund an expedition that will not reach destination before multiple hundreds of years, even if the said expedition doesn't consume the entire industrial output of a major nation.
Space is BIG.
I bet if you had a one-way mission to Mars leaving in 12 months, you’d have a flood of applicants. Many hundreds minimum and probably several thousand.
Out of 8 billion people, assuming you had selection criteria that were even as strict as 1 in 1000 qualify, out of that 8 million, I think you’d easily be able to raise a crew.
This isn't interstellar travel, but I guess it'd work the if you consider it to be a one-way mission.
> Out of 8 billion people, assuming you had selection criteria that were even as strict as 1 in 1000 qualify, out of that 8 million, I think you’d easily be able to raise a crew.
Sure, it's always possible to hire enthusiastic youngsters for suicide missions, but after a year in captivity with no end in sight the suicide rate among the crew members would already be sky-high, if you haven't already faced a mutiny to try bringing the ship back to earth, that is.