I average down my old holdings in south Indian bank, vedanta, tbz and Tata steel. Though i just average it down so i can exit 2-4 years time i don't plan to hold it longer as i am shifting my folio to nil or less debt companies.
Every crash is an opportunity. You can never time the market. During the 2008-2009 crash I lost wonderful opportunities.
Now taking big positions in good companies where there is low or nil debt and have future growth prospects.