Not to be politically correct, but diversification is ever so important. I was fortunate enough to see that the light at the end of the tunnel was a freight train, and cashed out half of my stock position in December at an 8 year high. Thought about cashing out on all, but wanted to avoid the AMT, plus at 45 I still need to have some stake in growth related pursuits. It'll be a long road back for the market, but the strong will survive and prosper.
I think tax-exempt municipal bond ETFs are a pretty good haven. They are not designed as growth products and stay within a relatively stable range. Their virtue is preservation of principal and to generate tax free income.