Federal prosecutors have charged Benjamin Paul Wiener, 43, from Sioux Falls, South Dakota, with 29 counts including wire fraud, money laundering, bank fraud, and aggravated identity theft in a case involving a $20 million cryptocurrency scam.
According to the indictment, Wiener operated multiple businesses, collected funds from dozens of investors across South Dakota and Minnesota, and deceived them about how their money would be used. Instead of investing as promised, he directed the funds to activities unrelated to the pitch, moving money through both banks and crypto platforms.
While Wiener has pleaded not guilty, the trial scheduled for September 2026 could result in over 30 years behind bars if he's convicted on all counts.
The case highlights common red flags that investors should watch for to avoid similar scams. One major warning is any promise of guaranteed or fixed returns in the crypto space, which is inherently volatile and cannot be predicted with certainty. Regulatory bodies like the US Commodity Futures Trading Commission regularly caution against offers claiming steady monthly profits or risk-free investments.
Another key indicator is a lack of transparency legitimate crypto managers openly share investment strategies, asset custody details, risk management approaches, and fund handling. Scammers often hide behind vague technical jargon such as "proprietary AI," "secret algorithms," or "institutional strategies" without evidence to back these claims.
Additional warning signs include pressure to invest immediately, unlicensed firms, false claims of government insurance, reliance on referral-based recruitment, and limiting account funding only to cryptocurrencies.
