What was we need to do there was only patience. Because every coin always give you a chance to be survive your self by bouncing back near your buy rates.
You need to stop and evaluate again your plan, find the mistakes and fix it, if needed change it. Even you only have 20% it will be enough to get your fund back, keep optimist and disciplines. I don't agree with " hold " because it's depend market volatility, chose wrong coin and keep hold it will create new bankrupt person. Every strategy need patience but sometimes you need to change it become " cut loss ".
Any new investor makes mistakes when trading in this market but if you take the time to think during the past period, you will gain a lot of new experience. Personally, I have encountered a similar situation in the past and it was actually the most difficult time for me so in the last 2 years I have become more confident and made a lot of good profits.