During the market from July 2016 to March 2017 steem lost 98.8% of it's value. In 9 months steem went from a $4.50+ coin to under $0.07.
The bear market from January 2018 to December 2018 lasted 11 months and steem lost about 98% of it's value (assuming $0.20 was the bottom). If the price of steem goes below $0.20 the bear market has lasted over 18 months.
I would consider accumulating under $0.10, but steemit would surely be bankrupt by then. So who knows.
What do you think the price is going to do?