Then you're wording it wrong. You are not investing, you are trading. And you never go long when any security is dropping and hoping it will rise. Thats just amateur.Of course I'd want to invest when it's dropping, it's just the matter of right timing.You dont want to catch a falling knife though. Why would you invest when the market is dropping lol. If anything, if you feel very bear-ish, start shorting and when the market uptrends and your indicators are proven, start buying.
And if were talking investing, then you dont just invest because of its price going up and down. You didn't even take the financials into account. Or how is the current CEO doing? Industry sector? If you're confident in what you invest in, the "dropping" in prices will not affect you because your proper valuation of ABC company in X amount of years will be worth more than how it is currently.