Book excerpt: The printing press, the combustion engine, the Internet and... now... Artificial Intelligence (AI). These are technological changes that have marked a before and after in the history of mankind. Every time one has appeared, it has meant a revolution with the consequent transmission of money from some groups to others. At this moment you are in time to take advantage of the latest wave, invest and obtain profitability. Of course, every investment involves risks. Otherwise there would be no profit either. The objective of this book is to guide you to know the possibilities and, thus, try to reduce the possibility of losing your capital and increase the possibility of obtaining significant profits. The book is divided into three parts. In the first we see how you can invest in AI in a particular way, even without money, using some tools to improve your daily life. In the second part we look at the options offered by the stock market. Finally, in the third part, we analyze projects related to AI that are on the blockchain. Here you will find my experience and my opinion, what I do, how I have invested and I am investing to get interesting returns in the short, medium and long term. You don't need money to do it, you will learn about free AI tools that you can put to work for you from the very first moment...