Safest Way to Store bought Gold

[Gothicalchemy]

So let's say theoretically, there is an uber Item on AH that you must have. Let's say in this case, It's a Swift Spectral Tiger, for 100k min bid and 150k buy out. (As unlikley as this seems, I have seen this twice this year on my server), or use your own example.

So... You buy 150k worth of gold.

Now let's assume that by the time your 150k get's here, the item is gone and you have no more immidiate need for money.

How do you store it?

Do you keep it on the same toon and prey he doesnt get busted?

Do you Deposit it in a Guild Bank that you own, and if so, would 150k Deposit get flagged, how much could you put it in without it getting flagged..

Maybe you'd put up Auctions on another account and use your bought gold to try n filter it, again.

It's the one problem in my mind I can't seem to find a work around for, your suggestions appreciated.