You mention BTC going to $10,000...if it only does that, to become a millionaire, you need to start with $500K. I think you mean $100K per coin, dont you?
I agree with the premise but not that BTC will make a lot more millionaires unless you are already in with a fair number of coins (50 or more) or have $50K to $100K to invest. What I will say is that millionaires will be created out of cryptocurrencies.