Lawnbuddah - unless you have a full set of the new DreamWorld collection of weapons, ring and armour you don't have the best weapons available in the game - I've not seen many people who have much of that gear yet. If you have got those, then is it all maxed out with 1000 enchants? if not you could use the coins to pay the elf for potions to enchant them. Also I spend a lot of coins opening mines and paying wells to rage up bosses for my guild so I never end up with a surplus coin problem. Always something to spend them on and really you don't have many there - a single mist costs me 344,549,846 and paying the elf for enchants costs me approx 16 billion. So if you're still stuck for ideas on what to spend on - give them to me lol.

And as the previous post says - if your guild isn't yet void +10 they will need you to donate coins to the vault too. Hope this info is all useful to you.
Happy Dreaming