I think it is important to think in USD terms, not in BTC terms.
With that thinking most of the early adopters of Bitcoin sold all their coins.
You can use any math you want to make yourself feel bad when something is going down, but I won't do that by choice

You could just have used your real life wage to buy more BTC each week...
Forum campaigns are NOT the same thing as dollar cost averaging, and in past most of them had only BTC value, not USD.
On top of that USD and all other fiat currencies are always going down in value, so $100 today is not the same as $100 few years ago.