But how am I going to be sure that the tokens that I will receive would be the same amount of $ that I have discussed with the employer?
Well, probably you will not be sure. This is what describes the cryptocurrency markets and the ecosystem in general. It is also how you see things. What if you agree on 200 and then market goes up and you cash out for 500?
Bigger risks, give bigger profits.
This is true for those who want long-term profits. There are many people that wishes to cash out early without losing their tokens value. I am just asking if their is a secure way to tackle the volatility in payments that occur on a later stage.