Are they giving tokens _instead_ of equity? Insist in getting equity, that's a third of the point of joining a startup. Sure, add crypto-tokens to the mix. But tokens instead of equity… pardon?
Tokens can on the other hand have value even if none the above happens, and you get a liquid market much earlier. If the monetary policy of the token is reasonable, and the market cap shoots up for one reason or another in the future, you'd make a big buck.
But would you make any money on your equity of the market cap of the token would go up? Not necessarily.