With that it seems that you've just generalized cryptocurrencies as having a negative impact to the economy which could not impart positive implications. Why not to think of positive implications? then later we'll focus on thinking things that would lessen the risk of cryptocurrency as a tool of cyber criminals in the world. One idea I have regarding this is to conduct KYC so that we could be aware of the transactions created by the people with their cryptocurrency. In addition, we should also keep into considerations to regulate websites and to make sure there's no illegal selling of items there.