Litecoin, seriously? why? Why would you invest in obsolete projects with no smart contract capability? Plus, those are all large caps so you are lucky to 2 or 3x in a bullrun. May I suggest some new projects and microcaps: TRI, REF, 0xMR, SimpAI, Bird, Q Blockchain, Shardeum
Your suggestion is not bad either but I think if you invest in the top cryptocurrency in the market it can be the best investment for the future.For example, tokens already in the market such as Mana,Sand,Matic,Dot .There are also some new projects in the market which can give good returns in future.New projects have the potential to give huge returns to people in the coming days.
You can take the Ocean Protocol which has given people up to 4x profit in this bear market as well.Gala also made huge profits in this bear market,and these are very good coins for long term investment as well.