Crypto Currency Balloon

I have been watching this Crypto currencies just going through the roof (bitcoin in particular).

Then I see advertisements telling me that I need to move into investing my retirement into Bitcoin and other currencies.

Has no one ever heard of self adjustments ? Happens in the real world every so often.

How much bigger is this balloon going to get before it rights it's self ?

We have had the housing, .com and other balloons that cost people major money out of their retirements.

We are still taking about a fiat money, there is NOTHING backing crypto currencies.

So.. when is this balloon going to pop ?