In a multi-fold universe, gravity emerges from entanglement through the multi-fold mechanisms. Yet, so far, the multi-fold theory has left unexplained, other than by principles, several key aspects including why and how multi-folds are associated to EPR entanglement as proposed in the multi-fold theory, how multi-folds are activated or deactivated; why no multi-folds between hierarchical entanglements; how the multi-fold mappings works; could GR govern the dynamics and kinematics (in AdS(5)) of the multi-folds. Recent analyses of traversable wormhole in 4D spacetime show that they can exist, without involving exotic theories and matter, if they contain two massive EPR entangled fermions in their throat: something immediately reminiscent of the right-handed neutrino stuck behind the Higgs boson in the multi-folds; if multi-folds were traversable wormholes. We also discuss traversability above the multi-fold gravity electroweak symmetry breaking energy, when all particles are massless and the case where the fermions are neutral, and in the 2D regime. It would make it plausible for GR to govern the dynamics and kinematics of multi-folds (in AdS(5)) and mappings, and provide a microscopic explanation to convergence of the ER-EPR conjecture with the multi-fold theory. Doing so shines a new light on entanglement, as resulting from attaching entangled right-handed neutrinos, and anti-particles, to entangled particles and the multi-folds, now as traversable wormholes, can be understood as gravitons. Also it can justify the dynamics and kinematics of the multi-fold mechanisms.Doing so, we derive microscopic interpretations, and justifications, for several of the multi-fold principles and heuristics mentioned in previous papers. The resulting self-consistency of the theory is compelling. Also it provides a different point of view on how more conventional approaches like ER=EPR should evolve, and could be used to move to a more quantitative formulation of the multi-fold theory. In a discrete 2D spacetime, massive, entangled (charged) fermions are not needed to ensure traversability: the multi-folds are traversable, and could still be considered as wormholes. It is at higher scales that the (continuous) models require it to be consistent with approximations of wormholes.