we know that bicoin is a very popular currency. do u know why bitcoin is so popular?

It became popular when the prices went to the moon. When that happened media have interviewed financial gurus, economist and prominent names in the banking industry. Well almost of them back then have created FUD, but still it gets the attention of the people.
Some people got curious and tried to do some research about crypto currency.
Mass media now has always have some news about Bitcoin or altcoins.