"There will be no problems with the exchange of our stable tokens"
Alone this sentence above shows that this project is not legitim; just avoid these kind of scams; I already worked with some legit blockchain projects and all were paying with bitcoin + ethereum and if you show better performance they gift you extra with their tokens.
If you call someone a scammer and do not show any evidence of fraud, it means that you are a liar and a slanderer.