I can clearly see that there are other cryptocurrencies that are beginning to dethrone bitcoin, showing off there quick and secured transactions, though bitcoin continues to be the king. What does bitcoin need to improve state your opinions.
For me, bitcoin needs to improve is the security and the password needs to improve and I suggest that they add a pin in case that the user forgot his/her password and also the system and system design of it, it so plain but it is good. Also, to have a fastet process of new campaign and signatures.