I never understood or agreed with this idea

And I'm not even talking about the "willing to lose" part which on its own seems to me a very erroneous, if not to say dangerous, approach (as they say, be careful what you wish for, lest it come true). You can just as easily lose your fiat savings, a bank deposit, or whatever, while with fiat it is sort of granted given enough time due to inevitable inflation

On top of that, if you happen to live in a country like Venezuela, crypto is likely the only viable alternative to safely store your wealth (if you have any) as holding paper dollars may turn out potentially lethal in this country. Indeed, reckless investments are likely to do more harm than good, but it is the same with investing in any asset, not just crypto