I think we can be pretty sure that fermions exist. We have several ways to describe them (Dirac, Weyl, Majorana, maybe someone I'm missing?), with different equations and number of components. My question is: are physical fermions
(1) either Dirac or Majorana or Weyl?
(2) just fermions, which we can describe in whatever way we find suitable for the theory we are currently studying?

If (1) is right, then what kind of fermions do we have in our universe?