Are you allowed to have alt accounts for storage?

Are we allowed to have alt accounts here for item and gold storage? Hypothetically speaking because I feel like this wont be a problem for me for a while but are you allowed to have "bank accounts" as in an alt to send items and gold to if you managed to fill bank and reach gold cap on all character slots. Slightly concerned that it may be bannable because it may look like gold or item selling when sending large amounts of gold or expensive items to a new account.

yes, you can.

there is nothing wrong with that. Btw you can just do the same with 1 char on your account... (unless you have already created 10 characters ofc)