I agree that even though bitcoin is considered a long-term investment, it's up to the trader to see the potential profit. That's why we have scalpers, but there's no specific time or day to consider bitcoin as a long-term investment; it depends on the investor or the trader. That doesn't mean bitcoin is long-term; you will just let it sit there. You can use some for trading to earn money because we have needs in everyday life.

Altcoin doesn't mean you will lose money or that it is not good for trading; it, of course, depends on the traders. Many traders take advantage of altcoins, which indicates trading will depend on the skill and knowledge of a trader. So any coin can be profitable; you just need to find or take advantage of it. If you keep losing altcoins, then it's the trader's fault, not the coins. I personally trade not just bitcoin but other altcoins and shitcoins, and so far it's gone well.