CO2 tanks have to be tested to 3000 psi. Helium tanks have a range of ratings from 1800-2400 psi. Look for DOT3A on the tank, the four digits after that will give you the rating.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk