The community's purpose is to guide investment strategies based on bottom-building principles, using bull-bear transitions as a reference, to focus on finding a few continuously growing varieties in the cryptocurrency market and A-shares, creating a long-term grid quantitative trading system: 1. In the upward phase, start building positions at the bear market bottom, doing spot grid trading long | up 5 down 0.5; 2. In the downward phase, start hedging at the bull market expected top, doing grid futures long | up 1.5 down 0.3, short hedging with 0.1 options or futures or margin. Bottom building and top hedging long-term grid quantitative trading varieties: btc40000u, eth, uni, aave, bnb, trx; bch, zec, link, ltc, okb; gold paxg, silver slvx; Tesla tslax, Apple aaplx, Nvidia nvdax, Facebook | metax, Amazon | amznx, asml | asmlx, Nasdaq qqqx, S&P spyx; actively growing varieties in A-shares. Investment three elements: bottom, growth, volatility; after looking around, it is still the long-term grid trading of growing varieties that is king: in the future, the main focus will be on long-term grid quantitative trading with big cakes, small cakes, other deflationary growth tokens, gold and silver tokens, U.S. stock tokens, and growing varieties in A-shares, with no other plays. Human nature has weaknesses, and it is difficult to withstand the torment of bull-bear transitions based on one's heart. Only by finding continuously rising varieties and building a long-term grid quantitative trading system that can withstand both bulls and bears can one truly hold on for the long term; simply put, it is to select a few varieties with deflationary growth characteristics, build positions in the bottom area of the scale, persist in grid trading long, and moderately short hedge with futures and options near the expected top | it is necessary to calculate the balance relationship well, which can then allow for simple mechanical operations to withstand bull-bear transitions, creating a money-making perpetual motion trading system. Fu Sheng has boundless power.