This is an interesting question, but I don’t think it’s necessarily the right way to look at trading. Having a large account balance isn’t a guarantee of success.
Instead, look at percentages and scaling.
If you can consistently trade with a small account, you can scale up using the same strategy.
Fractional share trading and leveraged forex trading allow you to test your strategy with a small account balance of just a few hundred euros.
So, if you can consistently generate a monthly profit from a small account, you can add more funds to increase your returns, as the percentage ratios will be the same.