Cristiano Ronaldo always sets new records and this season he also set a new record again thanks to the many goals he managed to score throughout this season. Maybe he is almost 40 years old, but this player still has very high enthusiasm and might even beat some of the young players there.
He is an ambitious man and player and he has scored 759 goals so far in his career. If nothing happens seriously with his body, he will try to play as long as possible to hit 1000 goals. Assuming he can continue to score 40 to 50 goals in one season, it will need him to play 5 to 6 more seasons and this requirement is very challenging for Cristiano Ronaldo.
We all know that's impossible, even he knows that would be impossible. All in all he had more scores if you include national team games as well, he is at around 800+ goals and I still think that he is not going to end anywhere near 1000 goals by the end, that's impossible.
However, we should realize that we are going to end up with him retiring not anytime soon as well, he is playing well for this level. Also, we need to remember, the older he gets, the lower level he goes to, he used to be at Real Madrid winning UCL, then he got older and worse so he went to Juventus, then he got older but United still got him, showed that he wasn't ready for that so he went to Al-Nassr, if he gets any worse, I am sure he could just find some Chinese club or something and score bunch of goals there too.