> I would be willing to risk a couple of thousand of euros and bet on them being successful in the long run. A company like this has nearly infinite potential for growth.

Seems you are disregarding competition, regulations and lots of other unknown unknowns here. As for a hypothetical listing, the investors themselves are there to make back their investment. To do this, they sell 'some' of their shares for a profit.

If they were to list, I won't be surprised to see the stock being heavily manipulated by the institutional investors just to catch the retail traders out.