I won't derail your thread - but yes, all else being equal posting up is just as safe, if not a safer model.
I've heard complaints about line changes with the guys running the 'send coins to bet xxxx' model. Send coins at one line, have it booked at another (typically worse) line.
The reason the post up model is just as safe, with a trusted bitcoin book that has automated deposits and withdrawals - is that many players post up, bet, and withdraw directly after a game. Rinse, repeat several times a day. Risk is exactly the same as the no-account model.
We're not talking about the dinosaur model of having to leave funds offshore because it's such a pain to fund.
Anyway, best of luck and please keep us updated on the situation!
Your argument is patently false and only gains any traction by ignoring the supposition "all else being equal."
Does the player gain security by adding the intermediate step of having his money held in a 3rd party account as opposed to wagering directly from his wallet? OBVIOUSLY NOT, SOLVE BY INSPECTION! Once again, surely you can't be so daft as to suggest otherwise.
You can say that a post-up book may effectively
approximate the ad hoc approach by shifting onus to the player to request payouts after completion of each wager. This only increases his relative risk by creating a barrier of inconvenience and tacitly grants that the post-up model is inherently less secure.
This is not an attack on your book. (I have plenty of other things to criticize for that purpose.

) It is an argument from basic reason on a topic which is ultimately unimportant.