There are many things you should keep in mind, my personal advice is as follows:

1.- You must establish if you want to be a market speculator or Investor.

2.- If you want to be a market speculator, you must be clear that you must follow the line of least resistance in the market, no matter if the market rises or falls, you must follow the direction of the market and hunt the movements.

3.- Do not let yourself be guided by any technical analysis, there are many who just want to monetize with advice that they do not follow, I recommend you read books by speculators like Wyckoff, Livermore, so that you learn to understand the market, even when you have arguments you will be able to separate the good from the bad of information.

4.- If you want to be an investor, the most advisable thing is to sell all Altcoin, put it in Bitcoin and leave it there until a new bullish trend process is recommended.