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.
Being furious in all aspect is very important to avoid beig victimized by those scammers.
Lots of projects around the market are potential to scam out, you need to be selective before placing your money if you intent to invest
with this industry, being alert and always updated will guard you in case you are part of the project that may runaway in the long run.