I think crypto currency is a very big opportunity for all of us, both to invest and transact between countries and crypto currencies, not to make people lose their economies, instead they will increase their economies, because no one can predict falling market prices or rising market prices.
Opportunity or risk, it is just simply how you want to view it that matters. What some people may consider risks, some might even see it as an opportunity once they are able to apply wisdom into making very good decisions. Crypto to me is not dangerous and the only time a danger may be posed is certainly how the individual approach things which to me, people are actually the main cause of the danger that befalls them and not crypto, because they have refused to utilize information and knowledge to make important decisions.