There are at least two scenarios where that's definitely not true.
(1) Planned, time-limited expenses that decrease net worth. For example, a child's college education. If you've budgeted for it, this is fine.
(2) General market wobbles. My net worth increases or decreases by tens of thousands in a day, just because of what the market did. (No, I don't have all of my assets in the market, but enough.) If the long term trend is downward and/or not keeping up with inflation, that would be a worry, but a dip here and there is also fine.
Is net-worth decrease a problem outside of these scenarios? Even that depends. It's probably still "no" if there are more income sources (e.g. social security, inheritance from parents) that haven't kicked in yet and will make Number Go Up again when they do. Less obviously, if you're going to run out of money at 150, that's not likely to be a problem. If it's at 75, that very likely is a problem.
It really is possible to save too much, though few do. Telling people to plan for an infinite retirement, which is basically what you're doing, is also bad advice. There's no virtue in scrimping and saving more than you really need to.
(1) Planned, time-limited expenses that decrease net worth. For example, a child's college education. If you've budgeted for it, this is fine.
(2) General market wobbles. My net worth increases or decreases by tens of thousands in a day, just because of what the market did. (No, I don't have all of my assets in the market, but enough.) If the long term trend is downward and/or not keeping up with inflation, that would be a worry, but a dip here and there is also fine.
Is net-worth decrease a problem outside of these scenarios? Even that depends. It's probably still "no" if there are more income sources (e.g. social security, inheritance from parents) that haven't kicked in yet and will make Number Go Up again when they do. Less obviously, if you're going to run out of money at 150, that's not likely to be a problem. If it's at 75, that very likely is a problem.
It really is possible to save too much, though few do. Telling people to plan for an infinite retirement, which is basically what you're doing, is also bad advice. There's no virtue in scrimping and saving more than you really need to.