4. Consult a certified financial consultant and invest in a diversified portfolio other than gambling, probably for the long term, at least 80% of your winnings.
5. If your winnings are even greater and allow you to quit your job, then use your time to learn finance.
These two complements each other. So, if your winning is a lot of money and it can last a lifetime. Consult someone that's an expert on financial matters. But at the same time, you have to learn on your own because not everyone is going to help you out as exactly as how they are paid for. You don't have to be reliant on them while they're giving some meaningful advises that you can extract, take or ignore. You are still going to be dependent on how you want it to be with the money you are having from the winnings that you have. People believe that if money comes from gambling and you've won it here, it will also be taken away quickly. I don't believe in such, it's all about how we make our decisions.
By doing so, you are moving forward to let that winning amount to work for you, consulting someone who knows how business will work for you or whatever investment that may be fit for you is the right thing to avoid losing it back, it's more benefiting if you manage to preserve the money, not just to use it for something that will allow you to enjoy but more on the side of investing to grow and give you more decent financial stability.