Now they say 1.2 btc likely at 1 million a coin so they think in the USA you need 1.2 million in 2035 which is only true if you have social security medicare and a pension.
All these are hanging on the fact that bitcoin makes it to $1 million in 2035, which is a very big "if".
Not saying it's impossible, but it's certainly not a factor decisions should be based on because it's too uncertain.