I bought a domain in 2003 with stinkfinger and my last name as a joke. Made a one pager, let it expire. Then in 2012, I was told by my current employer (non tech related) that my heart is in tech and web related things. I had mounting bills like kid in daycare (which if you're not a parent, you won't know 'yet') and had to make additional income.
So, me being me, and not doing much research, I bought a couple .CM domains which had the same names as very well known .COM domains. I wasted a bunch being fooled by Godaddy's fake traffic counter etc. My initial spending in the beginning was probably $2200.00. And I probably do not have any of those domains at all.
Two years ago I was editing html with Dreamweaver and then I made a friend who introduced me to Wordpress. And ever since then, it's been profitable. Meaning -- I've made my money back and a lot more, not job replacement money, but good as secondary income. Coming with ZERO experience 2 years ago, I am doing ok.
People mislead others because it is so saturated. But, once you figure out something for yourself you can make money.
Parking is ok if you buy a TYPO or an expired (used to be developed) domain. But, then you make pennies unless you have insider knowledge like some on here. Listen to SMURGE and others. Some just like to type in Godaddy coupon codes to get their posts up and immediately they call themselves knowledgeable domainers.
Just save money and buy good domains. Don't buy iLiketofeedsquirrels.condo and park it and expect people to visit and click on stuff.