You could discover that it isn't as great as you envisioned. "Stolen waters are sweet, and bread eaten in secret is pleasant" -Proverbs 9:17
where i am its legal at the state level, including retail dispensaries, which charge between four and five times as much as when it wasn't. don't know if that's how much its taxed, i hope that's at least part of why, and the state spends it wisely, or that its just what the traffic will bear.