Bumping this to thank those who answered. Thanks.
So what I'm getting from this is, unless I leave the money in the original account(s) and access it over time (which is not in the spirit of the thought experiment), I have to get 1000 Ebony certified credsticks per billion stolen. There's no other way to get that large of a sum of money into a portable form that meets my criteria?
(Yes, I get the money laundering part too, but that's the following step. The point of my question was getting the nuyen portable. Whether I draw the nuyen directly onto the credsticks somehow, or have a dummy account to dump the money into first, the answer appears to be the same)
If that's the only option, so be it. If not, other ideas?
You CAN directly transfer the funds to another account, of course, skipping the credstick phase. But that leaves a massive data trail that anyone will follow straight to your door (or the door of whatever shadow-bank you use). This is a good way to burn contacts and get dead, or worse, a bad rep. The reason for the credsticks is because that breaks the data trail, full stop, and anyone tracking the funds has to try and snoop for people who suddenly get windfalls of cash, spending like mad, and so on. I suppose it is possible to take a single Ebony credstick, and have a program set up to shift funds from the target account, to the credstick, and then to a different account, and repeat over and over until the account is drained. A fast computer could do it in a few minutes, but this is going to probably set off every alarm in the place unless your decker is really good, even with admin access. A good decker with admin access could perhaps make the individual withdrawals look like legit actions, but a pattern like that over such a short time is going to raise red flags the size of Brackhaven's ego.
Once the funds are in the new account, you'll want to launder it and put it in a third account (or several). That second account, by the way, should be a dummy with completely fake info, all leading back to the commlink you used for the transfers, which should then be either destroyed, or wiped and sold to a pawn shop. Have your decker scrub the logs on where the money from the dummy account went, of course. When dealing with sums like you're talking, unless you're moving them from one corp to another, then assume that, until it has been passed through credsticks and launderers a couple times, at least, and broken up into smaller piles distributed in different systems, that the corp accountants and deckers WILL find the trail. And even if they lose the trail, you keep your mouth shut about the job, don't change your spending habits, maybe leave town, maybe fake your death. Setting yourself up in a new sprawl (maybe in a new country) with a new name and identity goes a long way to keeping people off your case.
Remember, the ones and zeroes are critical, but it is the metahuman element that can easily foil the best laid plans. Same way lottery winners go crazy with the spending, and end up broke within a year or two. Except with corporate hit squads looking to make example of you.