I have not read any book before about money and investment and I have not read anything online about it online unless the ones that we have talked about on this forum. I believe in not spending lavishly and buying only things that are important and I know it is good to do business.
I know about bitcoin investment also.
There is one that people often talked about on this forum before which is rich dad poor dad.
To become financially stable or to do well in an investment is not about reading books. If this were about reading books, many motivational speakers who have read so many books on money would have become wealthy and have one of the best investments. But this is all about hard work. You can read all the books concerning money, but if you are not ready to work hard, there is no way one will be able to make money.
Those who have created wealth today were able to achieve it because of the hard work they put in; it didn't just happen because of the theoretical knowledge they have about money.