You should use the most conservative earnings assumptions when valuing the stocks in you portfolio. Use realistic growth rates. One final thought. Diversify your portfolio away from tech unless you have some legal or business constraints that limit you to tech. I don't care how much of a long-term investor you say you are.
Tech is no different.
Heck, tech is riskier than the average sector. If you doubt that, just look at the carnage of the last 11 months. Read our conflicts and disclosure policy . Order reprints of TSC articles. The tools you need to invest.