Not only LTC, but also DASH, XMR the first top coins that I think it is very difficult for them to go back to their heyday.
Why do you say that?
XMR is the No1 privacy-oriented altcoin.
I have a suspicion that privacy won't become a major concern till CBDCs roll out.
https://cointelegraph.com/news/digital-euro-could-come-as-soon-as-2026-ecb-officialhttps://cointelegraph.com/news/proposed-digital-euro-designs-lack-privacy-options-ecb-presentation-showsThe last cycle (2021 ATH) had tons of hype about DeFi, NFTs... the previous cycle before that (2017) had tons of hype about ICOs.
So I wouldn't be surprised if the next best thing is... privacy. We're going to see both legit ones (like XMR) and tons of scams as well. Every new cycle attracts scammers (BitConnect in 2018 was like LUNA in 2022).
You won't need privacy for everything (like paying the electricity bill or grocery/food), but there are certain use cases (not only illegal ones) where privacy-oriented altcoins will shine later on this decade.
ps1: LTC recently added MimbleWimble and it's more popular (CMC rank-wise) than XMR, ZEC, BEAM. Who knows,
maybe it has another chance to shine...
Being a BTC copycat is sure not enough, you need to differentiate your offering in the market.
ps2: Pay attention to altcoins that consistently hit a new ATH in every new 4-year cycle:
LTC ✔ ($412.96 / May 10, 2021)
XMR ✔ ($517.62 / May 07, 2021)
DASH ❌ ($1,642.22 / Dec 20, 2017)
BCH ❌ ($4,355.62 / Dec 20, 2017)