Its not bad to sell your holdings after all because that's what we called cut loss but if you think this dump is just temporary then better not to make any action or just keep on investing. We can't say when the market rise high again but you have to make yourself more confident about cryptocurrency, this is our future that's for sure.
relying solely on the exchange of crypto coins in good prices may take a little longer in that, with prices now falling it's better to buy some cheap coin crypto to sell later in the day when prices start to rise.