The presumption of innocence is a fundamental principle of the common law. The UN Human Rights Committee has stated that the presumption of innocence imposes on the prosecution the burden of proving the charge and guarantees that no guilt can be presumed until the charge has been proved beyond reasonable doubt.
There are rare court cases out there about crypto projects, and most likely you wont find any Supreme Court jurisdiction. The most judgements are decisions that crypto currencies are not considered as currency units in the legal sense, and therefore no authority in the civil law branch takes really care about, even criminal proceedings and trials often have problems to subsume those speculative objects under the current criminal law. Therefore the crypto sector is a paradise for all kind of criminals. In the best case the authorities regulate the trade market or the registration of financial services companies. In online communities the members of a forum are the prosecutors and the judges as well. The scam alerts are their accusation, and the success or the flop of a crypto project depends only from the judgement of that community. This momentum eludes any ordinary jurisdiction. Well, you wanted to come up with the legal side, so here you have a legal response.