I realize the "lotto" comment sounds a bit ridiculous considering where bitcoin is trading relative to where it has been, but there has been some talk of bitcoin's market cap potentially exceeding $1 trillion and beyond (for over a 24X move from these levels) looking out over the next 5 ~ 15 years, which is good enough in my books to call it a lotto-play.
I've actually made most of my money by simply investing a fraction of 1 BTC in "start-up" cryptos. Fast forward one year and I'm pulling out full bitcoins in profit and keeping half of my original "investment" -- that, to me, is "lotto earnings".