i have 300,000,000

[case_sin]

I have over 300,000,000 million gold that I made before, is there any use for it now with RoS and auction out? 

[Aikeelu]

Crafting top tier gems is expensive, that will take a few millions. Blacksmith crafts and Mystic enchants can take a lot too if you're unlucky, also transmogs if you change your look often.

Other than... just savings for a possible future patch where people start complaining that they have nothing to do with gold anymore and blizzard implement something new.

[hackerlol]

I have over 300,000,000 million gold that I made before, is there any use for it now with RoS and auction out? 

There is use yes.
300m Gold is sufficient enough for crafting plenty of the top gems. I believe its 20m per craft or so I've been told. You should enough gold left over for Enchant re-rolls as well.
You're golden. I wish I had kept more than the measly 60m I kept on me.

[relive]

I have over 300,000,000 million gold that I made before, is there any use for it now with RoS and auction out? 

Gold gain right now is zero and everything is expensive as ****, had 200 mil, got 150 mil left in 26 hours of play.

[Snowee]

There is use yes.
300m Gold is sufficient enough for crafting plenty of the top gems. I believe its 20m per craft or so I've been told. You should enough gold left over for Enchant re-rolls as well.
You're golden. I wish I had kept more than the measly 60m I kept on me.

Top gem is 500k/craft. I "lost" sofar 15mio, but I used 7mio to reforge old legendaries and 5mio for the new hellfire ring recipes.
Also I disenchanted all my gear, so there is no income from that. But when I start doing it again, I'll gain more gold than I lose.

[case_sin]

Thanks boys!

[manjax]

I saved up 4 billion, so I have no chance to use that up..

[Keldonv7]

In fact rerolling may burn ur gold pretty quickly

[Nebro]

yeah. When you reroll the same item, the reroll cost goes up exponentially. Mats stay the same, but the gold cost can get quite high.