Long term deflation will cause all asset prices to collapse by 80-90%, so it's a golden opportunity to go from laborer to capitalist, from nothing to get rich, as long as you prepare ahead of time. The Long Term Deflation is a war of survival: get rich or get wiped out. Very little economic data from 1929 remains for the United States. Japan's data from 1990~2023 is the only one worth analyzing and studying. Even globally, there is very little data on long term deflation, let alone the usual short term deflation line. Japan's long term deflation data and so on, are thankfully updated and published monthly by FRED. It was a great pleasure for the author to be able to cite these sources to verify almost all of his arguments. This book is the first general theory of long term deflation. In a nutshell, long term deflation is a proportional decline in the price of the dollar and the price of everything else in the world over a period of 5 to 30 years. According to the author's diamond dollar investment method, the dollar and the price of goods should be inversely proportional. However, the opposite phenomenon occurs: a direct relationship between the dollar and the price of everything in the world, lasting 5~30 years. If we analyze Japan in December 1988, the domestic dollar price and the Nikkei 225 stock price rose about 30% in proportion for about a year. It was a sign of the beginning of long term deflation.