there are currently 3 times more bids than asks in the orderbook; in these conditions a drop is very unlikely.
Not
that unlikely. There was a giant sell-off not too long ago and the order book looked similar. In fact, several times over the past 6 months there have been large sell-offs when the money in bids was significantly greater than the asks.
if i do a sell order of say 20,000coins at $1 each... (i wish i had 20,000 coins

)
wont i sell to all the bids all at once, so they don't have time to take off their bid?