I don't really engage in the ponzibucks part and don't touch exchanges except to on and off-ramp, and use crypto to pay for things like hosting, seedboxes, or other services I might not necessarily want my debit card directly attached to.
I like sending vendors $100 and spending $0.00005 in transaction fees and knowing that they'll get $100 (or $99 with some 3rd party integration like Coinbase Commerce) versus spending $100, of which Stripe gets $5 of and the vendor only sees ~$95 if I don't feel like I need the protections of a card, which is frequent but not all the time.
Crypto fits a niche in my life well, despite the wider crypto world having dumb controversies. Just like my HSBC bank account fits a niche well, despite HSBC's wikipedia page being ~50% controversy section by word count.