To a point a Christian turns from GOD, and they are on their way to hell in unbelief.
T0 continue a sinful life means not having the Truth of God's Word; but the traditions and philosophies of sinful men. No business being in a drunken state once saved!
Do believers sin? Avoid..live by the WORD
Yes, we can lose our salvation and not be prepared to go. Like I said, we can hope all we want after-the-fact, but once we have left this life.
The choice has been made!