That's an orthogonal issue. There are plenty of non-crypto investment scams (ask your local VC), phishing etc. Some part of the population will always be robbed or scammed, regardless of the name of your country, inflation rate or what currency you use to pay the bills.
Crypto may be higher on radar because there's lure of high returns because market is expanding rapidly, and, as in any bubble, some things will pop and some people will hold the bag. Just like with dotcom bubble or california gold rush.
PS. Even though California rush left most people without much direct profit, the indirect profit was that California was populated, infrastructure developed and it became an important part of the global economy, and as a free state was one more place where people could move to build a better future for themselves, even if they were not directly interested in the gold itself.