Dreaming of picking up money is a normal phenomenon and does not represent any signs. Dreams are residual activities of the cerebral cortex, which can better reflect the recent situation or a strong desire for something.
Buying lottery tickets is a gambling behavior, which needs to be treated rationally. If you have a strong desire for this matter, you can try to buy some lottery tickets to try your luck. But be careful not to indulge in gambling and keep a rational and objective attitude.
In short, dreaming of picking up money doesn't mean anything. We should treat it with normality.