Is it safe to ride with bent fork? My bicycle went from this when I bought it:



To this when I crashed (note the front fork bent where it attaches to the stem; front wheel almost touches the down tube):



Update: Just looked at the frame and saw cracks in the paint on top tube and down tube.
besides the structural issues, looks like this crash has changed your bike geometry rake, head angle, tail, and wheel base.  This will likely result in much more sensitivity to handlebar input.  

If you can, I would advise against riding the bike, particularly on low traction surface since a small jerk can put it a handle-bar lock and you into an endo.  

As others noted, the clearance from the down-tube is also cause for caution.  The steel fork can likely be bent back, provided that there are no frame fractures and wheel damage (hard to imagine the wheel being perfect with forks bent).

otherwise, it doesn't seem likely that the steel bike would disintegrate as you're riding.

good luck