You have already answered your question ,there are too many volume so the chance of growing is really hard to expect aside from being a centralized currency that make it a manipulative cryptocurrency
And I believe that theres no plan so far of burning but thats the best way the Dev must do for the XRP to pump in again like last year
With the supply of xrp which is quite a lot nowadays, of course this will greatly affect the price of the xrp token in the market, and we know in every business of course economic law always applies, in which the supply of excess goods will certainly make the price of the product go down so also if the supply of these products are limited / a little of course the price will be more expensive and I agree with you, which is this xrp developer needs to evaluate the number of their tokens circulating in the market, and burning tokens is the right step to increase the price of xrp tokens in the market.