No trading loss is worth sacrificing your life, if you get stressed out over a trading loss it probably means that you invested too much in crypto versus your total net worth.
You have two options:

1) Hold and hope that crypto rises again someday. Its an open question whether it will, perhaps the parabolic move from 2017 was a fluke.  

2) Sell out and take your losses, this is painful but may be necessary so that you can sleep normally again. At least in the USA you will benefit from a tax loss carry forward which will help shield future profits from paying taxes.

My advices  calm down, try your best not to stress and in the future make sure that your bets aren't so large that they stress you out and lead you to contemplate suicidal thoughts.  

Life is precious, think how your parents, brothers, sisters, wife, and mistress would feel if you killed yourself, all because you lost money on a speculative bet in a high risk asset class.