I’ve read that the United States is littered with bars and restraunts that were opened by lottery winners who had no idea how to manage a bar or restraunt. I imagine similar rules apply to deli or coffee shop ownership. If you’ve worked in one (or ideally managed) that’s one thing, but starting cold is overly risky unless you have a lot of time and energy to invest in learning the ropes.
If I came into 50k right now I’d stash it in a money market account and wait for a bottom to use it as a down payment. However, I’m currently renting and a long way from retiring. If I was closer to retiring, it would go into the retirement account.