The US was unusually stable, as countries in history go, over the previous 100 years. Even so, the nature of the stock market, the kinds of things traded in it, and the regulations pertaining to them, have changed fairly significantly since 1910. I believe a preferred share is still more or less the same thing now that it was then, but that they're used for fairly different things.

In any case, you should leave the judgment of whether your writing is still worth reading when it's ten, thirty, or a hundred years old to your readers, rather than trying to make the judgment yourself.