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You are right that a cashless society is on the way ..but what one the visa banking one or the cryptocurrency one and at what point will the banks make there move to take it over in some way they will try..
And with the internet being the the main tool for managing digital currency, it leaves it easily shut down ..
Viruses power outages most governments have full control of the internet and can shut down there country if desired, a lot of weak point to consider..
Cryptocurrency needs the meshnet to live on ..
This might make it truly independent and far less able to be shut off with the flick of a pen.

What happens when the drug cartels and organize crime families start funneling large amounts of their cash into crypto currency's? Sure this is already happening, but maybe these cryptos are rising ,not because of China, but some cartel is diversifying out of the $$.

Cashless society is almost here. Ask some retailers how some customers never use cash and expect to swipe their cards for the smallest purchases. It's frightening that people are so willing to have every aspect of their financial life being traced.