Even if people talk about doing that I think you'll find most people don't do that. Also, I think it comes down to their ability to withstand volatility. If someone investments all their wealth into growth assets and the market drops 20% the next day. It won't matter how much you explain to them that the strategy is what's important, time in the market if they have 25 years in retirement etc.. they will just take it out and go to cash. You said that if the market drops I will buy more, well that is not the normal response I would suggest. Especially when they're aware of their own investments. Nobody on here really beats the index over the long term anyway so I would just stick with indices that I am comfortable with and only use a small amount when the opportunity come up.
