There are other, lesser reasons, of course, including: to prove you can do it, to compensate for failings in other things, to impress others, to leave a legacy, to help perpetuate your genes, or maybe because you just can't think of something better to do with your time.
But I'll put aside those lesser motives, which I tend to view as psychological foibles. Basically, money gives you the freedom to do what you'd like – and when, how, and with whom you prefer to do it. Money allows you to have things and do things and can even assist you to be something you want to be. Unfortunately, money is a chimera in today's world and will wind up savaging billions in the years to come.
As you know, I believe we're well into what I call The Greater Depression. A lot of people believe we're in a recovery now; I think, from a long-term point of view, that is total nonsense. We're just in the eye of the hurricane and will soon be moving into the other side of the storm. But it will be far more severe than what we saw in 2008 and 2009 and will last quite a while – perhaps for many years, depending on how stupidly the government acts.
Real Reasons for Optimism
There are reasons for optimism, of course, and at least two of them make sense.
The first is that every individual wants to improve his economic status. Many (but by no means all) of them will intuit that the surest way to do so is to produce more than they consume and save the difference. That creates capital, which can be invested in or loaned to productive enterprises. But what if outside forces make that impossible, or at least much harder than it should be?
The second reason for optimism is the development of technology – which is the ability to manipulate the material world to suit our desires. Scientists and engineers develop technology, and that also adds to the supply of capital. The more complex technology becomes, the more outside capital is required. But what if sufficient capital isn't generated by individuals and businesses to fund further technological advances?