Ronaldo equalled Raul's record of 323 goals for the Spanish giants in their 2-0 Champions League win over Malmo despite Raul playing over 400 games more for Los Blancos than the Portuguese star, who also passed 500 career goals on the night.
Ronaldo has long been linked with a return to Manchester United, where he starred between 2003 and 2009 before a then world record €80 million ($90 million, £59 million) transfer to Madrid.
A move to Paris Saint Germain or even a shock transfer to Major League Soccer in the United States have also been rumoured.
"I am happy here, I want to win things here. I feel good, but as I have said millions of times no one knows what will happen in the future," the three-time World Player of the Year told Spanish radio station Cadena SER.
"We will see what happens tomorrow but at this moment in time I am happy at Real Madrid," he added.
"No one knows what will happen next year. I am happy here, but you never know what will happen in the future.
"I have to achieve things here, I feel good, I want to win things with Real Madrid because I think this club has potential to win things, but I don't know what will happen in the future."
Ronaldo spoke to the Spanish media present in Sweden for the first time since February after Real were humiliated 4-0 by Atletico Madrid.
The Portuguese was heavily criticised for going ahead with his 30th birthday party the night of that defeat after Colombian rapper Kevin Roldan posted pictures of Ronaldo and other Madrid players enjoying themselves on social media.
Barcelona defender Gerard Pique then sarcastically thanked Roldan for his part in Madrid's rivals success after they won the treble of La Liga, Champions League and Copa del Rey last season.
"It isn't the moment to speak about these things. When I don't speak it is because something isn't right, so every one can think what they like," added Ronaldo.
"It was my decision. I didn't want to speak and there is no one that obliges me to. I speak when I want to, Real Madrid have never put pressure on me to speak.
"Why do I not speak more often? Because the questions aren't good. What does this (Roldan) have to do with the game?
"You want to put me in a mess with what Pique has done, why does that matter to me?"