This is a beautiful pic that sums it all. Im going to translate this and show my parents and non geeky friends. It's easy to see how BTC is a legitimate place to put your wealth into. I hope when the world realizes this I have enough BTC to call it a day.
This chart is true for any crypto currency, but I don't see all altcoins succeeding.
There can be only one.
Yes, widespread adoption is the key.
And bitcoin has a head start.