Is Casper a good coin to buy?

As a keen observer of the cryptocurrency market, I'm curious about the potential of Casper. Could you elaborate on whether it's a worthwhile investment? With its focus on scalability and security, does Casper have the potential to disrupt the current landscape? What are the key factors that indicate its long-term viability? Also, what are some of the challenges it faces in achieving widespread adoption? I'd appreciate your insights into this emerging coin and whether it's a good coin to buy in the current market.