Daily more people are getting rich through bitcoin and other cryptocurrencies. It can be through trading, gambling, mining or various other services and in specific holding. Users who invested at least $10000 - $15000 by January month of ongoing year probably could have turned rich if he's in a third world country.
A lot of people managed to enlarge their capital even if they invested in Bitcoin this year. Let us say they spend tens of thousands for BTC when it was about 4K, and later, they sold it for 8K, now they are waiting for the next investment.
Indeed. There are always chances for new people getting rich with bitcoin. This situation you mentioned at the beginning of this year is a good example: bitcoin was near 3500-4000 dollars, then now, after some months we are already heading to 9000 dollars, it's more than 120% profit in few months!
And the market is still very optimistic, so this percentage can increase even more! Crypto currency is full of surprises, we shouldn't underestimate its potential.