Though the total supply is 99T and the circulating supply is 39T, I won’t fear about them releasing all the coins in the market, cause as far as I know the coins are held in escrow and only part of it can be released every month. Indeed its backed up by large banks and financial institutions and money transfers such as money gram and western union , we aren’t seeing significant growth in its value is due to the reason that it is still in the piloting phase with many institutions and is yet to be implemented.

Once it gets implemented, transaction in trillions of dollars will happen through XRP every day which will increase the trade volume as well as burn some part of XRP in each transaction reducing the supply. This will surely skyrocket the price of XRP in the near future.