Jefferson said "Eternal vigilance is the price of liberty". Which is probably one reason why we now have efforts to read him out of the discussion.
The drive to power and control seems to be part of human nature, and it is always finding new ways to organize and express itself. And because freedom is a matter of human choices, yeah, there is always the danger that people will choose to become unfree.
I think freedom has the enormous advantages of being more effective and more motivating. The free are better able to innovate, and to correct their mistakes. They have a better moral basis, which motivates stronger action over longer periods of time. The free can rely on the power of the individual, which mounts en masse to an enormous force, while the unfree are ultimately always awaiting direction.
The greatest risks to a free society are internal, the forces which erode freedom of speech and thought. Liberal democracies have a very strong track record against totalitarian societies. For the US, I think the decline in free speech and the growth of ideological thinking is a serious problem, and we may hit a point of lock-in where people cannot criticize the regime. Many corners of the country are already at this point, and have been for a while, and those zones are spreading. It doesn't help that resistance to this has coalesced under a cult of a crazed personality.
I think freedom will win out, but it won't be easy, and we'll have to work at it. Probably always.