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“If we would, hypothetically, explore the idea of the universe's contraction, the result would be similar to the black hole. Regardless of a much bigger mass of the whole Universe, as ours is, the absolute contraction would lead to the same point at which the black hole reaches maximum density. The point of maximum density is Zero, at which point the Big Bang happens (or the Universe disappears, which is less likely). In this sense, from the point of the result, expansion or contraction of the Universe would lead to almost the same result.” — Dejan Stojanovic
If we would, hypothetically, explore the idea of the universe's contraction, the result would be similar to the black hole. Regardless of a much bigger mass of the whole Universe, as ours is, the absolute contraction would lead to the same point at which the black hole reaches maximum density. The point of maximum density is Zero, at which point the Big Bang happens (or the Universe disappears, which is less likely). In this sense, from the point of the result, expansion or contraction of the Universe would lead to almost the same result.