There’s nothing illegal about cryptocurrencies. It’s just random numbers and code.

However, those random numbers have actual value, and governments regulate some transactions, particularly ones that cross national borders, to make sure those transactions do not hide a crime or go to individuals who the government has put under sanctions.

Some people of a Libertarian bent get involved in Crypto to keep their governments out of their business. But those laws still apply, no matter what the medium of exchange is, or how much those people whine about those laws.

Edited to add: I missed the bit where OPs question was about Samurai Wallet. Here is some info about them:

https://bitcoinmagazine.com/legal/samourai-wallet-breaking-down-dangerous-precedents

This is from a pro-Crypto online media source, and its bias is obvious. However, it is also from last April. The Biden administration was very hostile towards Crypto. The Trump administration has embraced it, and it would not surprise me if this prosecution disappears in a cloud of “quid pro quo”…

@kemotep @nostupidquestions I mean developing and hosting them is illegal and that’s because devs and stores are the lowest common denominator effectively limiting and disincentiving people from using them which I think is the point of a law so I think my statement is still accurate.