What is the alternative to helium?

I'm curious, as helium becomes increasingly scarce and expensive, what are some potential alternatives that could be used in its place? Are there any gases with similar properties that could be harnessed for scientific research, medical imaging, or even party balloons? Is there a way to recycle helium more efficiently, or is the search for a substitute truly the only viable option moving forward? I'd love to hear your thoughts on this topic.