A lot of people here probably don't even trade and just hodl cold storage coins.
Probably the majority.
When your income is delivered via btc, and your expenses can increasingly be paid directly in btc, you gain independence from fiat currencies.
Does a dip matter to traders? Maybe.
Does a dip matter to people with a steady income? Not really. Low prices just mean you can accumulate more coins.
Bitcoin's real value is independence - income independent of location, savings independent of imaginary lines on maps, financial autonomy.
Have I made some good trades absolutely. Have I made some bad trades, of course. I think you hit it on the head with this post. Days will go by when I don't even check the price. If it goes low enough buy more. When it goes to low does it concern me in the short term, yes it does. The fact is there is so much behind bitcoin, the technology, the investments, it's far from a Ponzi scheme, this isn't the end, etc etc.