Honestly, I think we are a bit late, at least to cash out millions. The only way we are going to be millonaires is if the value of a single BTC keeps rising to absurd numbers, like 100.000 USD/BTC. There are people that say it could even reach one million, but that's just absurd. Wouldn't it mean the USD is basically useless at that point? How could a currency exist on the practical world? Imagine you want to buy something really simple, like a pizza. You would be using really absurd small amounts of BTC on there. This doesn't seem very intuitive. Most of the average person shoping will be like for 0.00000000000000000000000001 BTC. Anyone else thinks this is nuts?
And imagine the super early adopters that right now have like 100k Bitcoins. They will be like the richest guys in the world. Will Govs and "the powers that be" allow for that to happen? If the "1M USD/BTC" scheme is ever true, basically it would mean super early adopters rule the world in the future. What an insane scenareo.
BTC is built with the intent on being infinitely divisible for just that scenario, should it ever occur. At this time, I believe we can go back to eight decimal places. In the manner of exchange, the explicit unit is really irrelevant as it is only a reference. In time, you won't be spending .0000014 BTC to buy a pizza; you will spend 14 Satoshis. It is true, however, that those holding very large sums of coin right now could be extraordinarily rich beyond comprehension. It is unlikely to happen to quite the extreme as the price rises and approaches those figures, they'll sell, as will everyone, on the way up to take some profits. Nonetheless, they'll be very well off.
In order to better your position you will have to look for ways, beyond the conventional 'buy at coinbase' method. You might have to do some trading ..pay attention to supply/demand and see if you can sell high, buy low. There's certain risk here, but there is no inherently risk-less venture that can make a person rich. Even the people discovering they are rich now, had to make a commitment to spend real money on something that was relatively worthless at the time. Despite actual investment figures, that was a huge risk.
You might also consider selling goods or your services for BTC. Probably the most productive and mutually beneficial (you and the bitcoin economy) thing you could do right now.
Don't despair. There is still hope!