yes since more than 90% are scams, i think we should check each project we invest in. i mostly prefer to investigate dex-es with credible business model and interesting options for liquidity providers
I think not all cryptocurrencies are fraudulent, because until now there are still some projects, more than 10% of the projects are still very useful for many people and make transactions easier, although like that there is still a possibility of cryptocurrency scam so stay alert because it is part of risks when trading cryptocurrency.