Is it unreasonable to buy 64GB of RAM?

First, I should clarify: I don't do video editing or rendering. I only play games. When I ask people, they say 32GB is enough. I know 32GB is enough for today and only for gaming. But considering the future, is it unreasonable to buy a 64GB RAM right now? I don't want to replace the RAM in 2-3 years. If possible, I shouldn't need an upgrade for at least 5 years. What do you think?