Crypto-currencies do not cause death, what causes death in the society are numerous and can not be attributed to Crypto currency alone. Bitcoin as a digital currency, can be earn by any investors after a long term investment, when earned by such individual, what he or she uses the money to do is not enforced by the Crypto currency, just as Bill Gate is not under any authority to direct or enforce him on what to use his money to buy or to invest in. Bitcoin have made many people wealthy and their life style have change for better, with no bad report of what Bill Gate is saying. Bill Gate might have been miss informed,  and looking at it critically, many Hard drugs dealers uses dollar and other similar Currencies , are we to conclude such Currencies causes death?