Of course it is but when it's pumping nobody cares. That's the reason why no serious exchange will ever accept RaiBlocks. Because it's unsafe, from many perspectives (every exchange, official one too, that has Raiblocks in its pairs when traffic is above normal goes down and for several hours per day, they are advertising it like 7000tx/s but in the case clients have enough bandwith and high end hardware, and still it's pure theory because nobody has flooded the network still, but floods are not needed, it goes down anyway). They should now have enough money to be listed in serious exchages but, I repeat, none of them would ever consider it, they don't want to go down because of a single unsafe crypto.