I'd probably go for option B though -- $30k with over a million coins puts me mostly out of range of my own capacity to spend. And I'd definitely want to see a lot of the world that the status quo otherwise wouldn't allow me to (those who don't play by the rules I mean).
I don't know if OP thought of that, but this one is actually a trap!
He said that the price will be forever 30 000$ , and since the dollar value in purchasing power will continue to go down this actually means you're basically stuck with fiat, in 20 years those 30 000 might be rent money for a few months.
So, if it's indeed a trick question the second option is way worse than the first!
I did think of that -- but while I'm certain fiat will only accelerate its value-losing trend, I'm still certain it'll hang on to a bit. Two decades I'm ready to say dollar numbers quadruple to today's figures (in effect, $7500 per coin of today's purchasing power) so still okay.
It's all fantasy guesstimates of course, but the other thing is in 20 years I am, sadly, close to my national shelf life. I suppose I'll be, if still around, rather too old to worry by then heh.