bitcoin for the future may be used as a legitimate means of payment such as credit cards and others

Well I do believe that this is going to happen in the future even though the people are still going to depend with fiat money but bitcoin is going to be a good alternative.
It is just going to be like a secondary currency for all the countries and their local currency is going to be the main currency.
If we are going to see the use of bitcoin it is already being used in every day life, just like me I've been using bitcoin for my everyday life.