I noticed that when i hover my mouse over gold a pop-up comes up and in it there are:
"Reliable Gold", "Unreliable Gold" and of course the amount of gold it takes to revive if you're dead at that moment.
What exactly is unreliable gold, and why is it in the game? I'd like as much info i can get about this.
Best Answer
Outdated answer
This is explained nicely on the Gold page of Dota 2 Wiki:
I tried to "research" this further by killing different things in a practice game.
You get reliable gold for killing an enemy hero. For killing Roshan everyone on your team gets 200 reliable gold. If an enemy tower is destroyed, everyone on your team gets reliable gold (and you get additional unreliable gold if you got the last hit on it).
Killing creeps or the courier gives you only unreliable gold.
At the start of the game you get unreliable gold, and then 1 unreliable gold every 0.6 seconds.
Abilities that give gold (thanks to Samthere for mentioning them):