I would like to know if cryptocurrency will replace fiat money in the future, also if so how long it will likely take. Also, I would like to know which coin you think would take over if one will. (E.G. Dogecoin, BTG, LTC, XMR)
will not. cryptocurrency will not be replaced with currencies like dollars or anything else. the two are very departing and will not be interchangeable
to replace fiat currency I do not think it would be possible, the two money are completely different, cryptocurrency will still be accepted in some countries but there are some countries that do not accept it. fiat gidunakan as their primary payment tool and cryptocurrency is the second.