who says it's useless ?? bitcoin is very useful for the progress of the world in the modern era now ...
because with the existence of bitcoin makes it easy to do all kinds of transactions ...
That is ridiculously wrong, bitcoin is not useless. Those people who don't trust and believe with bitcoin are those people who have no knowledge after all. They are just making false advertisement to make negative thoughts about bitcoin. They are not aware how bitcoin are useful to the improvement of the economic growth. Bitcoin helps unemployment problem after all.