This sounds like a partial match to Half-Breed by Isaac Asimov. This was first published in Astonishing Stories, February 1940. It was also reprinted in "The Early Asimov" (1972) as part of a bookform collection of Asimov's early stories.
Half-Breed is the story of Max, a child of a type known as "Tweenie" because of his being a mix between (hence the 'tween) martian and human. They are tall and slim with a crest of very pale white hair. Tweenies are treated as subhuman and I think have no rights as people in society.
The other major protagonist in the story is Scanlon, a scientist who rescues Max from an assault/bullying by a gang of teenagers, and then adopts Max. Scanlon is working on a new, cheap device for atomic power generation and Max comes up with a solution. This work and the resulting sales mean that Scanlon becomes rich (I can't remember if Max, as a Tweenie can own anything and becomes rich too).
Scanlon then uses some of this money to adopt a female Tweenie as a partner for Max, and a couple of young Tweenie children. He then goes on to adopt all other homeless Tweenies and creates a town for them, where they can be people free from prejudice and discrimination, and works for their official government recognition.
Eventually it is revealed that the Tweenies have developed their own spacecraft and are about to leave Earth to colonize Venus as their own planet as they never felt at home on Earth.