Is Polkadot no longer a security?

Could you possibly explain why Polkadot is no longer considered a security? I've been following the crypto space closely and remember when Polkadot was first introduced, it was often grouped with other securities-like tokens. But lately, I've heard different opinions on this matter. I'm quite curious as to what has changed? Is it due to regulatory clarity, technological advancements, or perhaps a shift in the community's perception? Could you elaborate on the reasons behind this shift, and how it impacts the future of Polkadot within the cryptocurrency and finance ecosystem?