Key Shemitah dates have always corresponded with major Bad Events. And right now there are a ton of Bad Events that are either politically or economically inevitable so it’s reasonable to expect one of those likely suspects on October 2nd.
My guess is that we’ll get something from out of left field, totally unforeseen, the significance of which is only evident in hindsight. Something like the assassination of Archduke Ferdinand – no-one could have seen where that would lead.
At this point, whether you believe in the Shemitah or not, the only stupid move is taking no precautions.