I feel if you're only responsible for yourself, and no one else, there's nothing irresponsible about risking your entire life savings on crypto.

I feel there's nothing wrong with this.
Others think it's irresponsible because they feel it would make their own lives worse.

But not everyone feels that way.
There are people who live off bare min perfectly content with their life style. To each their own.

I would love to be in a position where I have $25K saved and nobody else to care about but myself ...and just blow that entire shit on a random top 50 crypto, and let it ride to zero. By the time it gets that low will be a couple years anyway. By then I'd work that savings back. No kids, no credit card debts... Just living out of a nice van.