Beside dotcom bubble which make a small number of early investors extremely wealthy, I can't think of any investment that will go up exponentially for late investors.
Bitcoin market cap is 7.7Billions it could reach hundreds of billions of market cap of today's dollar considering the potential
For exemple, Paypal valuation is 40Billions
Bitcoin has many other competitors out there more than Paypal. And governments around the world are doing everything they can to discourage its usage.
Lots of people think that Bitcoin is great to do payments. I'm not sure if payment-protocol is the perfect use-case for Bitcoin.
But what I do know is, that Bitcoin is great in what it was intentionally ment to be. Good for hoarding. Good to put your savings away.
Costs you 0.- to hold it over years, compared to other commodities
The clue is that bitcoin needs to attract people, but it's only attracting people if the price is right.
And the price is only right if the chart is right.
The difference between the .com bubble and the Bitcoin bubble is that the .com companies burn money every day (because they have to pay bills, employees..... ).
The Bitcoin value doesn't get burned away by just sitting there. It only goes down if people sell and quit with Bitcoin. If more people leave than enter.
I'm here to stay
I can add to your argumentation that you can travel with your wealth stored in a brain wallet and it's great to wire money