To be safe, get two Bitcoins.
Or better three. To be 100% calm about your retirement
If you can retire off of 2 Bitcoins in 30 years or whatever or whenever you retire, you must leave dirt cheap:)
I would guess you are going to need around 1000-2000 coins in order to retire successfully.
You're wrong,
You wont even need a full Bitcoin.
Wow, the You're wrong defense. I guess i lose. I highly doubt the coins will be worth 5million dollars in 30 years. I HIGHLY DOUBT THAT. Of course that would be absolutely awesome if it was true. I thought I was stretching it with coins being valued at 3,000 to 4,000 dollars.
That sound kind of impossible, the market cap would be so huge it would be basically overtaking the global economy. Many country would be running solely on BTC and everything would have BTC transaction embedded. I'm not sure thats possible in the first place, but if it would happen, it would take longer.
There can't be that much progress in so little time. Something bad would definitively happened if we leaped into the future by that far so quick.