I think the elective alternatives can be Ethereum, Cardano, Litecoin. Though the price of ethereum is dropping nowadays, but I still believe Ethereum will recover its position. Cardano and litecoin are the two most promising coins in the market that I believe have a great future ahead.
I also think that if to replace Bitcoin then Ethereum is the most worthy coin. Ethereum has a lot of practical applications and trust of investors, with the management team always having many improvements that have helped ETH to thrive in the past and in the future I believe that ETH will also huge growth.