$250,000 is very conservative prediction. It would go much higher. Number 1 reason is because government is failing so their fiat money is losing value.

My father invested on 401k began from 18 yeard old. Now he is 60, the same amount of money he can withdraw now. But what is the value of all the money he invested? The time he invested a 300 dollar is worth real 300 dollar but if your withdrawing it today your 300 dollar is now worth 200 today or even worst... The inflation is a killer. Great blog @jrcornel