I know a few people who take asprin daily and maybe for some high risk people it might make sense. I would be nervous about long-term effects that are stated with asprin. I've read that asprin slows the spread of cancer, so if you have cancer already it might be something to consider.
I think I'm better off eating vegatables, fruits, teas that help prevent cancer.
There are so many studies out there that a glass of red wine a night is better for your heart than asprin.