I understand that within my frame of reference, matter (at the "outskirts" of the Universe), which is moving at near the speed of light must be approaching infinite mass. And, of course, we now know that the Universe's expansion is accelerating, further intensifying this mass gain. From this, could we say that at some point out there, the mass might be forming a shell of blackhole-like material? And, due to relativistic effects, at this same point, spacetime is curving around on itself. Might this offer an explanation for a few things: (1) the blackhole-like material (let me call it the "superlarity shell" to distinguish it from a black-hole's singularity) has such large gravitational mass that it is accelerating more mass toward it, explaining the effect we call dark energy. In other words, dark energy may not be a push from within, but instead may be a pull from the fringe. (2) the relativistic spacetime curvature at the "outskirts" reconciles the issue of the Universe being "infinite" (in the sense that there is nothing outside of the Universe and the Universe goes on "forever" in the sense that there is no discernible boundary, with the issue of the Universe being "finite" since it started as a finite entity within an infinitesimal volume and has been expanding at a finite rate ever since the Big Bang. (3) as the "superlarity shell" gets more and more gravitationally massive, each segment might begin to pull-in on adjacent segments to begin the process of the "Big Crunch" as was once proposed. And, as was once hypothesized, this Big Crunch could end in a singularity-bounce to create a new Big Bang. This would explain a "forever" Universe that cycles through expansion-contraction phases, which seems more pleasing than the Universe never ending as it expands forever.