Cant we even think for the poor people out there? and those beggars? How can they get their life if btcs become the currencies?
Especially for that reason, the Bitcoin will never get accepted as a everyday currency. To become the currency it must be first adopted by the government. For the government to push it further to the legalization and proclamation as currency the must provide the necessary equipment for all the citizens in the specific country. Not all people have the internet, computers, smartphones for the paying with the Bitcoin.
That is the main problem with the digitalization!
FIAT will always exist and even if the Bitcoin is struggling to achieve the implementation for the Bitcoin investors it is more tempting to make some profit from the market fluctuations then the transfer of the Bitcoin and change to the currency as such.