College education for my future kids

I [29M] am single with no kids, but I know I really want to have some one day. Would it be smart to start saving for their college education now, even though they don’t exist, or is it considered stupid and futile to do something like this and force myself to budget aggressively when there’s no real need to?

I saw in my sleep that I got a new job and a raise and I decided that I should save 4% for that future college fund.

Is this thinking way too far ahead?