If they're incompressible (i.e. fundamental) particles though, then there's no inconsistency: any single electron can't compress itself into a black hole, becau

If they're incompressible (i.e. fundamental) particles though, then there's no inconsistency: any single electron can't compress itself into a black hole, because it's experienced gravitational attraction can't increase - it doesn't can't pull on itself because it has no internal structure. Two electrons on the other hand can, because above some point when you push them close together the force between them rises above electrostatic repulsive and they'll pull their 0-size closer and closer until a singularity forms. Of note, black holes on this scale aren't going to be stable though: they'll evaporate pretty much as fast as they form from Hawking radiation. EDIT: Of note - at this sort of scale it's not entirely clear to me that whether an electron is a black hole is a meaningful question either. Black holes can have spin and charge, so an electron and an black hole masquerading as an electron would be superficially indistinguishable - it would weigh the same as an electron, and so electrostatic force would dominate all its interactions. This has been speculated: https://en.wikipedia.org/wiki/Black_hole_electron https://en.wikipedia.org/wiki/Black_hole_electron though not observed at the moment. But the inconsistency isn't because it would not be sufficiently "electron-like".