(1) Bubble: http://www.economist.com/blogs/babbage/2011/10/virtual-curre...
(2) Fraud and Robberies: https://en.wikipedia.org/wiki/Bitcoin#Theft_and_fraud
(3) Money laundering: https://en.wikipedia.org/wiki/Silk_Road_(anonymous_marketpla... , https://en.wikipedia.org/wiki/Bitcoin#Taxation
(4) Gambling: https://en.wikipedia.org/wiki/Bitcoin#Gambling
(5) Ponzi Scheme: See "Bitcoin Savings and Trust" in https://en.wikipedia.org/wiki/Bitcoin#Theft_and_fraud
Almost all of that was found in the Wikipedia article for Bitcoin (with citations). Please don't be too lazy to do your own research…
(1) Bubble: http://www.economist.com/blogs/babbage/2011/10/virtual-curre...
(2) Fraud and Robberies: https://en.wikipedia.org/wiki/Bitcoin#Theft_and_fraud
(3) Money laundering: https://en.wikipedia.org/wiki/Silk_Road_(anonymous_marketpla... , https://en.wikipedia.org/wiki/Bitcoin#Taxation
(4) Gambling: https://en.wikipedia.org/wiki/Bitcoin#Gambling
(5) Ponzi Scheme: See "Bitcoin Savings and Trust" in https://en.wikipedia.org/wiki/Bitcoin#Theft_and_fraud
Almost all of that was found in the Wikipedia article for Bitcoin (with citations). Please don't be too lazy to do your own research…