Hydrogen is flammable. Helium is not.
The problem with helium is that it is becoming very rare and global supply is low. Helium cannot be "made" in the traditional sense, it takes time as it is the product of nuclear decay. Helium is the only element on the planet that is a completely nonrenewable resource, helium physically disappears from the planet. It's the one element out of the entire periodic table that escapes the Earth and goes out into outer space.