In 2019, his home was raided in connection to a Nigerian lottery scam, for which he converted between half a million and $1.5 million to cryptocurrency over the span of half a year. He was ultimately charged with "illegally operating a cash-to-cryptocurrency conversion business", to which he pleaded guilty (by his telling, in an attempt to get charges against his family members dropped).
Hopkins claims that "any time anyone with a crypto trades p2p (i.e., not with an exchange), they're legally liable under this statute as it's currently interpreted", though authorities have claimed that Hopkins knowingly aided the lottery scammer by telling them "I'm set up as a marketing company, so tell them you're paying for a marketing campaign".