Everytime the crypto market rises and crashes, the exact same way it has the last two cycles, folks come out with the "ponzi scheme" shyt, "it's a scam" etc.
Keep in mind, you don't even have gold backing your dollars at this point, and the government has already shown they'll manipulate the circulating supply as they please thus devaluing your hard earned savings.
Crypto is absolutely speculative, but I would just suggest to anybody who's interested, don't blindly listen to folks yelling "scam". If you bought 1 bitcoin at the PEAK of the last cycle in January 2018 before it went bust and everyone went back to calling it a scam, you would still be up almost double your money currently. If you bought it at the floor when it was at around $3500 in November 2018 you'd be at about 9x your initial investment right now.
Do your research as always, but don't blindly believe a random guy on the internet yelling scam, and don't believe a guy telling you you'll get rich overnight. The truth is, if you're smart, you do your due diligence, and you only invest money you're willing to lose, you can absolutely make a profit. My profit from trading crypto last year damn near equaled my salary and I'm making 6 figures currently. And I didn't even have my strategy dialed in as well as I could have. Again, be smart about it and DO YOUR RESEARCH BEFORE INVESTING, but there's absolutely a lot of money floating around in the crypto markets to be had if you know how to move.