I'm looking for writers with a good knowledge of cryptocurrencies and a bit of developing.
An English native developer who wants to write something for me would be even better.
Everyone does know how to wrote in English, how are you going to evaluate if someone is really a native writer?
Does he/she is saying something like do do da da?
Im guessing you are not a native speaker of the English language.
The grammatically correct way to write your sentence would be:
"Everyone knows how to write in English, how are you going to evaluate if someone really is a native writer."
Unless you were trolling, in which case, carry on!