6 years of experience in the cryptocurrency circle: BTC, ETH and a few platform coins with good performance are the main ones that perform well. Other coins are mediocre, and doge and shib are OK. Many altcoins are mostly in a trend of returning to zero. Only in 2015 and 2019, two waves of bull market were set off with the help of the Bitcoin halving cycle. According to the law, the next wave of altcoin bull market may be in 2023. Except for the halving cycle, altcoins are not suitable for long-term holding. The main reason for this phenomenon is that the vast majority of altcoins lack long-term planning, and all publicity and basic technology are just to be able to enter the exchange and sell chips in the secondary market. Once the altcoin dealers make a profit, they will no longer maintain the project, nor will they spend money to pull the market. For them, it is better to restart a new project than to let investors get out of the trap, which is more cost-effective! Therefore, the final outcome of most altcoins is to return to zero! As an investor, you need to consider the following when buying altcoins: 1. It is best to be in the halving cycle; 2. It is best to have certain innovations and contribute to a certain stage of the entire industry; 3. The dealer has strong funds and high financing amount; 4. The early entry cost is low; 5. This project will go to zero 99.9%, so you should withdraw when the profit is almost enough. 6. Switch to BTC and ETH.