I suspect that it is not a matter of insight but actually you just enough income not to worry about it too much. Good for you! However if your expenses rise, e

I suspect that it is not a matter of insight but actually you just enough income not to worry about it too much. Good for you! However if your expenses rise, e.g. you buy a house, have kids, etc. you might find you need to put a bit more effort into making sure your income covers it all.