I am in bitcoin field since a year and if personally speaking then I never feel like bitcoin to be destructive in nature as I also feel bitcoin to be very potentiating one as I also saw the people getting benefited by it and earning a lot through the bitcoin though there are some defect with the bitcoin and the foremost and the important one is its illegal use but it is no longer a defect as it could easily be resolved once it will get legalised all over the world and then from all the aspects bitcoin is only useful, there is nothing destructive in this.