So I've been schooled twice about different versions of this.
1) An "Anchored" asset in the case of Tether (https://tether.to) being anchored to US dollars, has loopholes. Don't go there.
2) A pretend asset like Marscoin/XMC (https://marscoin.app) has realtime quotes that make it look like it's anchored, but it's not. It's just backstory for a game even though it's calculated in real time.
In any case, if you are in any doubt about what you're doing, take your time. Lawyers take forever but personally I have chosen to go slow and not go to prison 🙂