Leaving things to trust is not an option IMHO. Unless a company can guarantee that there won't be another round, they can always change their mind. I'm not sure if any company can give any such guarantee.
That’s a bit disingenuous; of course no company can make a 100% guarantee.
There is still a huge difference between “this is the only round of layoffs, we will grow past this” (when this is the true intent) and “that’s all for this week. We’ll be back with the next round of layoffs on Friday”
When a second round breaks that trust though, all bets are off.