This is beyond of my prediction, many altcoin surpass ATH, not only ADA but others like VET, ETH, BNB and others. But also many altcoins still below ATH, this is depending on the each fundamental of crypto. For next, some altcoin also has high possibility to surpass ATH because this is just beginning of bullish market.  According to my technical analysis, some altcoin like LTC have potensial to going to new ATH around $1000.