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Is there a limit to the pressure a fluid can hold?

neutron stars are pretty high pressure :)

but using neutron star juice in any practical sense is fraught with extreme difficulty! :P

It is very hard to use neutron star juice. The biggest issue I imagine is how very far away they are. The next issues I imagine you run into might be the extreme forces present inside and near them. I'm not actually sure what a neutron star is. I kind of imagine matter breaking down into neutrons, protons, and electrons from being squished so hard. If a neutron is made of a proton and an electron, then I guess it might kind of be like a big neutron mass, maybe, with a sea of excess protons or electrons as a shell on the surface, sloshing around outside it like a fluid made of raw electric energy. Is a neutron star what makes a pulsar? Is the pulsing from an ion shell sea sloshing around? I don't know. Let's look up "neutron star". https://en.wikipedia.org/wiki/Neutron_star - neutron stars have a 1.4 solar mass and a radius of about 10 km. they're like a small dense sun-corpse that you could stuff into a suitcase to bring to their collapsing-ritual. - neutron stars hold their shape from a combination of nuclear forces specific to being a highly-compressed mass of neutrons. when these fail it becomes a black hole. do not compress neutron stars into black holes. i imagine this could be done by e.g. directing them to collide. people might be sad if this were done. - neutron stars are about 600k deg hot on the surface - a matchbox sized amount of neutron star juice weighs about 3 billion tons - the magnetic field is 10^8 - 10^15 times stronger than earth's - surface gravity is 200 billion times earth's - neutron stars rotate rapidly due to conservation of momentum during collapse, like a figure skater pulling her arms in - neutron stars are a superset of pulsars, which are the ones which emit beams of radiation - the mass rotation axis can differ from the electrical rotation axis. this produces the sweeping effect of the beam making the traditional pulsar. Hmm. Neutron stars sound like a powerful source of energy, and attempting to consider their incredibly-massive innards "juice" in the "extractable fluid" sense sounds like a very difficult challenge. However, this is our last chance to rescue this matter and energy before somebody collapses it into a black hole!