I was raised Pentecostal and the "left behind" theology was often preached generating considerable fear that if I was involved in some kind of sinning when the rapture takes place, I would be left behind. It also provided a slim hope that following this would be a 7 year tribulation period and I would be living in circumstances that would likely have me killed for repenting of those sins and holding unto my faith.
I remember some pretty scary sermons that suggested if I was doing this or that or was not doing this or that, I would not qualify to be raptured. I could hardly wait for the sermon to end to head to the prayer room and pray that I would be in the rapture. Not much assurance of salvation and certainly not any eternal security belief.
Currently I would say I am a 'panmillennialist'

(it will all pan out as God has it planned). I don't live in fear of not being saved even though I do sin (as do every Christian) as Jesus has paid for all my sins past, present and future. I believe Jesus saves to the uttermost for those who fully put their trust in Him.
So, end time theology, to me, should not have much bearing on how I currently live. My next breath may be my last one. That, imo, should be more worthwhile to consider in how I'm being an ambassador for the Kingdom.