why bitcoin is attractive to investors? Any good opinions or answers? Thanks
Because its independent from banks, goverments, politicians. That alone is unique world-wide.
Its store of value that can be easily accesible by you all over the world with internet access. That alone also is best reason to invest/store value.
That thinking makes this system very attractive from the eyes of those who wanted to be free from the government jurisdictions. The concept of being liberated with such control of your money without any interfere from banks and government. While in it's investment side, Bitcoin being volatile have a good chance of increasing value once adoptions happened with wider places.