Nurses pulled to other units

So, it seems as if every day and night shift nurse is being pulled daily. At the minimum 2 on days and 2 on nights. We have had up to 4 pulled on night shift to go to another floor to work. We are getting pulled in the middle of a shift after 4 or even 6 hours of work. I work in the ICU. Staff is frustrated, although we take turns within 2 days it's your turn to go again. I have been on ICU for 8mos. For me it's very frustrating because I know have to float to other ICU's or even Open Heart Recovery. Scary!!!! We have had a big turnover and the hospital has cut back on jobs. We are forced to flex up on the beds when we are capped. We have 3 pt assignments, new admits 30mins within one another. It is not a safe environment at all. I feel as though I need to look for another job because things have been going downhill, but I am not finished getting my experience as an ICU nurse. I feel as though I should go PRN and then find another full time job, I can't afford to be DTO'D or even lose a job for that matter. All of our experienced nurses are leaving and pretty soon who knows I may be the experience and that is not cool because I am still learning and have a miles to go. The hospital seems not to care and want to cut back on cost. I guess my question is am i jumping the gun by finding another full time job and stay prn or make moves to secure myself?