Generally you should strongly avoid putting generated artefacts into version control. This leads to complete pain if ever you find yourself trying to diff or merge when they inevitably change. The problem is that you end up with conflicts which are completely unnecessary - you should always be able to just regenerate the virtualenv at any time.
This is especially true for non-relocatable artefacts (as others have mentioned) such as virtualenvs or compiled binaries.
Another thing is that these generated artefacts can be costly in terms of space consumed in the repository - maybe not so much for a virtualenv with one package in it, but for binaries or larger virtualenvs, these things can become quite large. In addition they're often not so friendly for git's delta compression which is better suited for textual data. You can end up unnecessarily increasing the size of your repository significantly, which is another thing best avoided.
Generally you should strongly avoid putting generated artefacts into version control. This leads to complete pain if ever you find yourself trying to diff or merge when they inevitably change. The problem is that you end up with conflicts which are completely unnecessary - you should always be able to just regenerate the virtualenv at any time.
This is especially true for non-relocatable artefacts (as others have mentioned) such as virtualenvs or compiled binaries.
Another thing is that these generated artefacts can be costly in terms of space consumed in the repository - maybe not so much for a virtualenv with one package in it, but for binaries or larger virtualenvs, these things can become quite large. In addition they're often not so friendly for git's delta compression which is better suited for textual data. You can end up unnecessarily increasing the size of your repository significantly, which is another thing best avoided.