Whilst any new commodity being sold will have fraudsters in the wings ready to try out their next scam, I wonder if crypto currency is a sustainable phenomena in the first place? 

Many are sceptical and see the world of 'bitcoin' as a Ponzi scheme. As history tells us what goes up invariable comes down! I fear the sharp rise in value and press worthiness that has been seen in 2017 will see dramatic results on the other side. Whilst this currency may prove volatile to the detriment of investors we could well be embarking on a new lifestyle currency that is here to stay. Once all the 'bumps' have been ironed out. Oh and that huge crash everyone is talking about!