No, the concept of losing one's salvation is a circular fallacy. Since God sees the end, why would he "save" someone he knows he's going to "unsave" later? What was accomplished? - nothing. The person was never saved.
By that reasoning,
since God sees the end, one is not really saved (yet) and cannot really know one is saved until one reaches
the end.
This is the problem when theology is based on a French (nothing against the French) lawyer who, about fifteen centuries later,
reformed the theology that was once delivered to the saints.
The wise man will believe all the warnings and take them to heart, not being deceived by one's own heart, but doing all the commandments of the LORD Jesus Christ, demonstrating one's faith by one's works.
For a good tree bringeth not forth corrupt fruit; neither doth a corrupt tree bring forth good fruit. For every tree is known by his own fruit. For of thorns men do not gather figs, nor of a bramble bush gather they grapes. A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.
And why call ye me, Lord, Lord, and do not the things which I say? Whosoever cometh to me, and heareth my sayings, and doeth them, I will shew you to whom he is like: He is like a man which built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock. But he that heareth, and doeth not, is like a man that without a foundation built an house upon the earth; against which the stream did beat vehemently, and immediately it fell; and the ruin of that house was great.
Luke, Catholic chapter six, Protestant verses forty three to forty nine,
as authorized, but not authored, by King James
"By that reasoning, since God sees the end, one is not really saved (yet) and cannot really know one is saved until one reaches the end."
That is true whether in either instance. If one can lose their salvation then one never knows whether they will end up losing it until one reaches the end. Yet, the book of Ephesians tells us that once saved our salvation is secure. The presence of the Holy Spirit is a "seal" of our salvation and a "guarantee of our inheritance until we acquire possession of it..." (Eph 1.11-14)