Bitcoin has no flexibility as a currency. It cannot be manipulated to stimulate or slow an economy. The growth rate of bitcoin is so slow that it ensures that the population growth will probably always outstrip bitcoin growth, severely lowering the number of bitcoins available per capita, leading to permanent rentiers of the money supply. Also, as lost bitcoin are not replaced, the supply dwindles further. At some point the pace of losing bitcoins will out strip the rate of bitcoin creation.
This is not a how a society's currency should work.
this is false, Bitcoin has 8 decimal places and could be moved to 16 decimal places if needed, it is hard to predict how the math will work out in the future
if it proves to be infeasible you just fork the protocol to a more feasible one. One of the main differences between Bitcoin and traditional fiat is who decides monetary policy.
This is not a how a society's currency should work.