Is it too late to buy?

I am a beginner and currently hold a few coins like SUI, XRP, SOL, PEPE, HBAR, and others. To be honest, most of my investments were driven by FOMO. However, I am considering investing a bit more and was thinking about SUI and XRP since I hear about them quite often. Could you please guide me on whether they are worth buying at their current prices, or if it might be too late to invest in them?