I don't know if this would work or not but here goes.

We currently have a double XP egg which lasts 3 hours, how about 1 of the other eggs wherever you choose to eat it places a chest bank there for 3 hours, as the current use of the other eggs are quite rubbish, and this way would benefit skillers but not in an unfair way e.g not allowed to eat the egg in Wildy for obvious reasons.

Example, I'm at the magic trees for log farming and the walk to the bank is becoming quite tedious, so I purchase a bank egg (price to be decided) and eat it beside the magic trees, spawning a bank there for 3 hours or whatever time frame therefore allowing a quick banking system and boosting farming and economy. You could also possibly have them purchasable with tokens as we currently do with subscriptions, bringing more donations to the server, I for one would definitely buy tokens to be able to bank quick in places ridiculously far from a bank.

Just an idea so don't flame me too much but give your opinion too. Thanks.