The next halving

I’m curious, currently break even on a 100th s19jpro is about 5.63 per day or .0563 per th/s at .08 cents per kWh. Obvious not profitable right now but with next adjustment could be at break even. My question is this, next halving when reward drops by half, how will any miners be able to stay online? Newer machines today aren’t that much more efficient. No one in the USA is getting electricity for less than .06 cents. What does this do for the security of the network? What does this do for the potential of btc?