I have lost so much sleep
If that's the case, your are simply over invested.
I really can't understand how People can put so much in a new technology they use sleep over it.
I put only play money into Bitcoin. Yes I could be ridiculously rich by now if I had risked my complete savings. But I still think this would have been absolutely retarded. I'm happy about what I have, not sad about what I could have had.
And I still have a healthy sleep and check the Bitcoin price maybe once a month. Forgetting about Bitcoin the Moment I go to bed.
For the Future, I hope with your sleepless nights you have learned your lesson. Invest enough to be happy about it when it works, but only so much you can easily forget about it. Especially if it's the even riskier mining business.