I regret not getting into BTC when I first heard about it. I was working at a major tech company when it launched and a group of my friends got into it. Tons of them were server admins so they got into mining. I was into other stuff at the time. Despite being fascinated and having money to spare, I didn't get involved.
Several years later, I'm finally getting involved. I still consider right now to be 'early adopter' territory. We're JUST now seeing some more mainstream acceptance (with Overstock and Tiger Direct, among others). I really enjoy BTC and cryptocurrencies overall being considered as the internet of money. (Here's the article, I'll let him make his own point
http://theumlaut.com/2014/01/08/bitcoin-internet-of-money/)
Imagine getting in on the internet a few years after its inception? Or television? I believe cryptos are just as revolutionary (if not moreso).
For that matter, making any type of income online (BTC or otherwise) is still early adopter territory in the grand scheme of things. As far as I'm concerned, widespread high speed internet is little more than a decade old. Most of humanity still isn't online. If you can tap the internet to earn an income, that's cutting edge of humanity shit.
Anyway, I'm rambling. My point is - we're still early adopters in BTC. Invest what you can when you can. The price is always going to fluctuate. Stop worrying about the BTC/USD number and look more at what you can do with it.
Let's adopt BTC as a currency, not as a commodity. That's certainly still early adopter territory.