Ripple actually has its own function in payments between companies and companies , overvalued or not it's really hard to say about that because the fluctuation of Ripple is hard to predict. I used to bought Ripples at 0.25$ for each 2 months ago and look at it now ? And if i was overvalued without any application so why people keep using it and buying it? Banks will not involved with this , specially with cryptocurrencies because they are their most terrifying enemy.