I think some altcoins will surely be able to grow to their new ATH during the next altcoin season, which I believe could be after the next BTC halving. As for the FUN token, the Coinmarketcap website says ATH was 1114 sats in 2017. Honestly, I don't remember if it really was or not, but now it's hard to imagine that FUN token will be able to reach that ATH again, or even half of that ATH.