The first card, the reversed Four of Cups, indicates that you may have access to significant profits and rewards. The card also indicates that there is a strong desire for transformation, so there will be opportunities for change and evolution. This suggests that investing could lead to some form of long-term success, but be aware that not all risk will be eliminated.

The second card, the Two of Swords, suggests that investments may not be adequately protected against risk. This means that you will need to be cautious and take the necessary steps to minimize the risks or avoid them altogether. This is made clearer by the third card, the reversed Queen of Swords, which suggests that the investor will face problems and financial difficulties if he does not take the correct precautions.

Making an informed investment decision in a promising start-up requires a better understanding of how financial markets work and how to manage risk. You need to understand the right rules and procedures to follow to make sure your investments are safe and effective. You also need to be able to evaluate the guarantees and insurance offered by the start-up in order to protect yourself from any future financial problems.

In conclusion, the three cards suggest that investments in a promising start-up can lead to significant profits but one must be aware of the possibility of high risks. Therefore, before making an informed decision it is necessary to better understand how the financial markets work and how to manage the risks associated with investments. Consequently, the most likely answer to the question is no: it is not recommended to invest in a start-up without first learning how to manage the risks associated with investments.