I have nothing against wanting to invest in altcoins. But I do believe that only very few and close to little altcoins will reach new ATHs. Maybe they will just rise for a few times but ethereum or xrp may not reach their ATHs again. There are other reasons why one would want to invest in altcoins like transactions purposes but I believe if you are hoping to see a coin reach new ATHs this cycle, it will only be bitcoin.