Wrong. People who use crypto as a casino - that is, "invest" into it or "trade" it - are a numerical majority but they aren't those who make actual money there. Actual money is made by those who use it for:

- Tool/facilitation of "brick and mortar" crime, as well as some cybercrime (moving drug money across borders, way to pay ransom in a way difficult to track, etc).

- Tool for scams.

- Hacks, including (but not limited to), on-chain hacks.

I know a lot of people who made 9-digit sums in crypto. None of them invested or traded coins (none were from the 'crime' category either). Most typical kind of people are those who did hard-core (hundreds of thousands of accounts) sybil attacks on ICOs and launchpads in their heyday in 2017-2021. So it was scripting/scraping/cloud deployments using residential proxies/buying passport scans on darknets.

Also those who ran Solana nodes from massive sybils too (up to 200 people - it's 1 node per person so one has to have many persons). While that probably qualifies as speculation/"trading" Solana, servers being little but a booster, so in part it was "casino".