The reason why my gut instinct says he won't be is because those who can pull of an assassination are well-organised. This usually demands a strong pool of resources, and that supply of resources comes from people in power.
It is a tad on the conspiracy theory side, but my opinion is that Obama works for the establishment. He supported the bailout, he's still for as many wars as McCain is ("peacekeeping" and "nation-building" ones instead of "pro-active defence"), and most importantly, they are both completely oblivious to the Federal Reserve system. This election was a safe one for those corporations who are currently benefiting from the government's special interest spending.
The Federal Reserve system is the most unconstitutional authorities in the United States. The constitution clearly states that only gold and silver tender is to be used. The Federal Reserve prints fiat (paper) money. This system is not even regulated by government! It is partially owned by private banks, and the printing of money costs the middle-class millions of dollars through inflation. Essentially, the Federal Reserve is an unregulated tax machine that usurps wealth from the general welfare to the special interests who control the Federal Reserve.
Congressmen, senators and presidents who have had suspicions about the Federal Reserve have had a tough time in history. There are uncertain deaths that surround some of these figures.
Read:
http://www.theforbiddenknowledge.com/hardtruth/congress_mcfadden.htmDo more of your own research. This is stuff I take lightly, because I know conspiracy theorists often take 'evidence' which is quite ordinary, view it selectively, and blow it out of proportion.