Every single business decision in life is a "gamble".
In fact, millions of people gamble with their money in the banks everyday. Some get it all stolen.
The issue is how much the odds are stacked in your favor. That's what matters.

If Bitcoin needs to go to $1600 right now, to double people's current investments into profits, then take a look at how far Quark must move to accomplish the same thing.
Is it likely Quark will fall below .25 and stay there, or is it likely to go to .50 cents sometime soon. The gamble is also whether bitcoin will drop in value. Bitcoin is not likely to increase right away, by substantial margins. That would mean another 12 Billion would have to be invested for it to become worth $1600 each. The current market cap is pretty high for the amount of use it currently has in the marketplace based on vendors accepting it etc. Quark, on the other hand, is primed to go on the Chinese exchange soon, and it's heavily promoted by Keiser and Still, both respected in the underground and alternative news scenes. Quark is very likely to rise past .50 cents soon. So, it's practically no gamble at all. It's more like taking candy from a baby.