In my own personal opinion, Bitcoin has made those who invested in it early rich already, right now, buying an average $100 to $1000 worth of bitcoin will never make the individual buying it rich, even if the price of bitcoin hit $100,000, except the individual is ready to wait till the year the price of 1Bitcoin hit $5,000,000 or more, which to me, is unlikely to happen in the lifetime of that individual, even in the next 100 years, its still unlikely to me.
And on the other hand, investing hundreds of thousands of dollars or even millions of dollars means the individual doing that is already rich, he or she is just looking for some, its like buying an item and reselling it for a higher price for some profit, so it is with the already rich people buying bitcoin, they are not buying it because they want to become rich, but buying to resell for profit.
This is the thing, you underestimate bitcoin, pretty much like people who in 2010 and 2011 were hoping for a milestone of $100 and in their wildest dreams thought of 1k high.
Bitcoin went wild in the next few years, hitting $300 in early 2013 and then people started thinking a step forward, about 10k, but the next big thing was 20k. 10k was never a big top.
The majority of people always look a step forward and only exceptional visionaries manage to see beyond that.
Say you'd spent $100k in bitcoin last year at 15k and your end game happened to be 250k, which by all means is achievable in the next 10 years. Would you say that it didn't make you rich? That would be 1.6 million. Enough to live happily ever after in most parts of the world, assuming that you're not completely broke and in debt before bitcoin hits that level.