Have a look at Byteball. Strong fundamentals and a nice reward for holders. If you own some BTC, you should also participate in the GBYTE airdrop for BTC holders.
Byteball's market cap is already hyped and I don't think it can make 3x.
Somebody said Digibyte DGB, I don't know this one too. It was dumped like 11x from its all time high value.