Which coin did you buy at ATH? You can stoploss or hold to new ATH (if it is a good coin) 
PRL, EXLIX, XSPEC.
To be honest, I didn't check these coins, so I don't know if that are good projects, but for sure you have to HODL to new ATH! You will need a lot of patience, because your funds can be frozen even few months, but it is the best solution in such situation.
All you can really do like the rest of us is to hold, no amount of whining can you seek help from us who also bought at the ATH. Good thing in my case I was able to trade my losses with other coins. Better evaluate as how can you get back your lost investment by investing through other coins.