If you buy Bitcoin for many years, this does not mean that you will not be able to make a profit during this period. If you collect Bitcoin and plan to hold it for approximately 10 years, then During this period, you will be able to increase your portfolio at least 4 times by selling at a higher price and buying at a low price. Based on historical indicators, this is real and people do it all the time.
But in the end this is not part of investment anymore but rather leads to trading because after all, investing within a certain period of time indirectly implies that we will invest for a long duration and we must be prepared to hold for the duration of time that we make as our goal.
When you say you invest but always sell when the price is high enough and buy it back when conditions are crashing in the near future then it is not investment but trading.
Although it's okay to do that because it's not wrong to do that, I think it's still not an investment so it's quite wrong if we say we're investing but buying and selling when we haven't reached the time period. Unless the concept is to buy on the dip and wait until the duration of time as you said (for example 10 years) I still consider it an investment but when buying the dip and selling it when the price is felt to rise it is not an investment.
The April 2024 Bitcoin halving represents a unique investment opportunity, backed by historical price increases and supply contraction. With predictions of significant price increases and a more mature market, now may be the right time to add Bitcoin to your investment portfolio.