I can not answer this question. I have more than 20 coins in my portfolio, which I believe. If I try, I can identify the 5 most promising in my opinion. I can not choose only one.
it can be useful if it can be utilized as best as possible and maybe for now it can still only be for some individuals, especially bitcoin investors because the government has not fully legalized the crypto currency as the prevailing currency, perhaps as the development and economy can happen