vttoth.com/…/311-hawking-radiation-calculator

Indeed, any black hole with a mass greater than about 0.75% of the Earth’s mass is colder than the cosmic background, and thus its mass increases for now. As the universe expands and cools, however, eventually the black hole may begin to lose mass-energy through Hawking radiation.

Size isn’t the main factor, mass is.

A teaspoon of what neutron stars are made of weighs as much as Mt. Everest.

Its the mass, and apparently the threshold for an actually stable black hole is 0.75% the mass of Earth, 4.48 x 10²² kg … or, roughly 2/3 the mass of the Moon.

So… basically 0 chance in our natural life times we’ll figure out how to convert the Moon into a blackhole, lol.