in future im sure bitcoin will be stable at ~$500 (after mining ended)
more country will be use bitcoin, and bitcoin will be number 1 online payment
Why would a country use a system like Bitcoin? A country wants to control its currency and it's a normal thing to do that

every country now has their own currency i think bitcoin will be only an alternative source of payment in the future
yes, in the future bitcoin only as an alternative payment, and people still use own currency as the main payment.
but did not rule bitcoin become the main payment even beat currency.