It could be if there are other investors buying their tokens. because all investors are still busy on the new ico ico and do not choose the old token
If what you're saying is true, they committed the great mistake. Ripple's XRP has already proven its potential and it's favor and supported by banks as compared to the newly born ICOs they had nothing yet to prove. I recall one smart contract developer in the other forum once said, "Out of every 100 projects 99 is a fraud, or a scam, as we used to call it." So, if I were to invest I prefer the old one that already proven its potentials.
in my opinion this coin is not understood at all, and why she grew so much I also do not understand 
Well, that's your opinion and I honor it. However, I would recommend you to do some research so you may understand and enlighten your mind about Ripple's XRP. No offense, mate, take it as a friendly advice.