The Krytox grease is obviously a joke, but, for less perspicacious readers who might take the other part of the comment seriously:

Inexpensive marine grease is not actually "cheap" or "crappy". It's excellent for use on bikes, and the only real drawbacks are that 1) it's messier, and makes contamination harder to spot, than something like this, and 2) it's probably thicker than you would want if you're racing and want to squeeze every last bit of performance out of high precision bearings in bottom brackets and hubs. Otherwise, I'm not aware of any genuine reason not to use it on bikes, and, in fact, it's not only inexpensive but probably better than most bike-specific greases in terms of sealing power and hardiness.