[kosciusko51]

Hydrogen is a fuel, which has been used for decades in rockets.

[American Constitutionalist]

And believe it or not, they have used hydrogen peroxide as rocket fuel, the 90% hydrogen peroxide.
100% hydrogen peroxide is very unstable.

[backwoods-engineer]

Hydrogen is a fuel, which has been used for decades in rockets.

Show me a source of H₂ that you can get without pouring energy into separating it from another compound, or leaving Earth.

You can't.

It's not a fuel, it's an energy storage medium.