This is my list(with reasons):-

Vechain - Bringing the supply chain management on the blockchain. Supply Chain Management is something that'll not end as long as the companies in the world offer goods and services to the customers. Expect this coin to grow in the future.

Monero - This coin overcame some of the limitations or rather enhances the privacy and scalability that most altcoins and even bitcoin does not offer. There's the reason darkweb is craving for this coin.

Neo/ethereum - Both are same in a lot of ways. Neo, also known as ethereum of China, is a project that offers Smart contracts, decentralized apps(DAPPS).

Litecoin - Less hash block generation time(2.5 minutes) so faster transactions. Fees is nominal. Less  supply, so has the ability to shoot up in the future.