A net worth statement or P&L is worth the paper it's written on 50% of the time. A creative book keeper, or just a plain crooked number manipulator can make them read however they want, much like the current "journalists" can adjust "facts" to meet realities.
Net worth is tied to so many intangibles (market rates, inflation rates, future performance of securities, actual worth of properties without current inspections, expected real estates markets and projected values, the direction of the wind, etc), that they are just about worth as much as the paper they are written on. Net worth can be established with some hard valued items such as stock price, IRA value, 401 cashout figures, chattel values, real property values, gold, and many more things that have tangible market values, so saying the establishment of net worth is difficult in painting all these situations with the same broad brush. It is incorrect.
But to say net worth can be determined by projected or estimated future income is a mix of EGO. LSD, mescaline, psylocibin mushrooms and angel's dust in the mind of the preparer. Either they are misinfomed, optimistic, or just not in the here and now.
People fall down every day and break things. People go in every day for CABG. People every day get run over by beer trucks, or are on the wrong bridge for he wrong ten seconds.
If one can predict who these people are, and when and where they are going to die, they need to contact the NSA immediately, and they will be offered a very lucrative contract for doing same.
MHO, YMMV.
Steve