The orgy of greed surrounding Alibaba’s impending IPO has already made early backers rich, but will John Q. Public get to share in the lucre? There seems to be little doubt that the company is destined for colossal success.  And yet, there are reasons to doubt that it can operate as honestly and efficiently as such trusted U.S. companies as Amazon and eBay.  In the meantime, it would hardly be farfetched to suggest that a financial event hyped as promiscuously as this one could put a top on the U.S. bull market.  It will be a very difficult act to top, for sure, and that mildly depressing fact could cool the fever on Wall Street for the foreseeable future.