On my opinion base on my observation bitcoin is the new era of currency because formerly we use of barter treading and that time people didn't use money but now we are using money by means of payment in form of coins and paper money and also now there is a bitcoin, it is a digital money discovered and exist in this word and accepted by means of payment. Bitcoin is the most efficient money right now.
It seems that there are still many issues to be solved, we all know that the confirmation of transactions up to a week continues to increase, even more than 300k reports declare unconfirmed transactions, this is certainly worrisome because if users continue to increase then more and more problems.