Like most trends, at the beginning it's driven by fundamentals, at some point speculation takes over. What the wise man does in the beginning, the fool does in the end.
BRAIN, n. An apparatus with which we think that we think. That which distinguishes the man who is content to be something from the man who wishes to do something. A man of great wealth, or one who has been pitchforked into high station, has commonly such a headful of brain that his neighbors cannot keep their hats on. In our civilization, and under our republican form of government, brain is so highly honored that it is rewarded by exemption from the cares of office.
In death - no! even in the grave all is not lost. Else there is no immortality for man. Arousing from the most profound slumbers, we break the gossamer web of some dream. Yet in a second afterward, (so frail may that web have been) we remember not that we have dreamed.
A spirit of criticism, if indulged in, leads to a censoriousness of disposition that is destructive of all nobler feeling. The man who lives to find faults has a miserable mission.
When man does not have firm, calm lines on the horizon of his life- mountain and forest lines, as it were- then a man's innermost will becomes agitated, preoccupied, and wistful.