What is rich?
Having financial freedom where I can just retire if I want to and not worry about being a slave working. To me that's at having at least $10million usd in today's value.
50k/btc would make me $500k, it's not $10mil but good enough for me right now
If you are in you 20's or 30's and have $500k in liquid assets and no debt, that is excellent financial security, at least in the US. If your smart and frugal, you should be able to avoid money problems. It would most certainly be enough to free you from being a working slave. I'm not saying you wouldn't ever have to work again, but there are a lot of awesome jobs out there, especially seasonal stuff, like working in a national park or being a sailing instructor. You could just earn a little here and a little there while you $500k grows and compounds.
Owning boats, a fancy Manhattan apartment, five star dinners every night, well yeah, that kind of lifestyle is going to take incredible amounts of resources to support.
My main financial objective is to maximize my freedom and security. For me that means a simple life style, at least with respect to consumption, and big amounts of money / other financial resources. In essence, living as far below my means as possible.