I met a genuine Bitcoin millionaire yesterday. I cant give out too much detail since I dont want this to come up in a search engine, but he was paid in Bitcoins for contracting work as a side hustle when BC was going for about $50 each.
He told me in the beginning it wasnt easy after putting in 8 hours on the job and taking care of family duties and then spending the evenings working on this project.
In the end he collected hundreds of BC for his work. Frustrated he had no place to spend BC other than on esoteric things, he regretted taking BC for payment at one point. And yes, he did buy pizza with it "back in the day".
He sold some, investing in a few nice homes, a stable of nice cars and lots of good times traveling all over the world with his wife, with millions left over generating monthly income.
What allowed him to hold them for so long was his day job paid well and he really enjoyed it.
I told him my Mt. Gox story about trying to buy 2 BC for $200 just for fun....then Mt. Gox was hacked and went Chapter 11 and I was relieved I was not able to deposit funds in time. I regret not continuing to pursue it.