There have been many investments in the history of CS: GO that not only made back what was put in them but made people fortunes.
Using CS: GO market for profit is definitely not a simple activity. Lots of people keep their money there, but earning money by predicting prices is really hard.
This is shown by a simple comparison of the prices in 2013 with those that prevail now. You can clearly see what you could earn money on and without a major problem. For example, you paid $ 0.05 for one of the crates, now the price is $ 75.
What could you earn on?
As the graphics show, Dragon Lore is by far the biggest jump – from $ 340 to nearly $ 9,000. If someone in 2013-2014 bought a few for himself, today he would be able to afford not only a car but maybe a flat. The rest of the chart is also very interesting:
Of course, there was no way to predict all of this. Today you can only regret it, but not many in 2013 wanted to put a few or tens of thousands into CS: GO with the hope that this skin will be worth several times more.