They don't indicate timeframes per se but I am guessing it might take 5 business days or even more until I can actually post a sell.  I did not see any obvious ways to take advantage of the techniques to speed things up, e.g. pay for wire transfers, etc.  Then again I am not interested in selling at this time.  I suppose I could sell a small amount just to prove that it works.

Again, these are just some of my Roth IRA funds; I also have non-retirement Bitcoins that I hold in a few different wallets myself; easy enough.  Unfortunately holding Bitcoin in retirement accounts is not easy ... yet.  To do so I am obliged to trust a custodian although I haven't finished investigating the so-called self-directed checking-IRA.