Do you think Bitcoin will remain the most dominant coin both short and long term? Even though it does not remain the most dominant coin, this will not be the same as saying that Bitcoin wont exist long term.
right now bitcoin is still dominating the cryptocurrency market and perhap for a very long time from now. I believe everything will come to an end, so bitcoin is not an exception. One day in the future, surely bitcoin will be loose in the competitive market and will be replaced by another better coin, but that may be a very long time because bitcoin is still the most powerful currency on the market.