if we are here for a reason what is it?

what if earth is just a cell in another creature?
and we are just the small enzymes and proteins found in the organelles.
we could be one of the organelles or we could be cell just by ourselves.
since a cell and the earth is roughly made up of 70% water.
the trees and jungles are chloroplasts, 
humans are something like energy generator or transporter, we produce energy and carry them around.
Some people will say that is crazy, there are millions of other solar system.
Well, that can be true, since we have millions of cells. 
some might have the same function but in different parts of the body,
so you might possibly find another 'Earth' in another solar system.
it might not look the same, the creatures inhabiting it might differ also.
because according to Universe Today researchers found that 50 percent of stars have a planet of Earth-size or larger in a close orbit

the solar system can be one cell by itself containing different organelles such as the planets.
or it can be an organelle itself and the Sun being the nucleus or some special pigment.
or maybe this larger creature is highly evolved with one cell with a function of two cells.
probably functioning as red blood cell and skin cell or something like that.

What if we are not the only creatures in the solar system.
i know this question has been asked thousands of times.
but what if we haven't even fully understand our own cells yet?
maybe there are smaller living things inside the ribosomes are nucleus,
questioning about life.
like why the fuck am I just going through the same thing over and over again till it dies.
or that thing having monday blues or going through some crisis.

anyway, if anybody has the same thought as i do,
i would love to have a discussion.