Most people just abandoned Bitcoin when the price is very very low. They don't even think that the price can surge and hit $100.000 because they think that is impossible. But then when the price slowly increase and hit many new ATH, they will start pay attention to Bitcoin although they still not trying to buy and hold Bitcoin.
They don't think to use Bitcoin as their investment because they are still prefer with their current investment such as gold and others. Or they don't want to open their minds to see the other opportunity to become rich in the future.
That's why knowledge and consistency in investing in Bitcoin are important, because many people who enter Bitcoin invest by just following other people, they don't understand Bitcoin's volatility and its potential in the future - even many invest like gambling/trading. Because if they understand how to invest properly in Bitcoin, they will not be affected by the market, and will continue to regularly invest in Bitcoin at any price using their discretionary income or money they are ready to invest, and hold it even more than 1-2 cycles until they can get a decent profit from it.
In fact, those who understand Bitcoin and know the real potential of Bitcoin, they continue to hold Bitcoin continuously. Consistency and a long-term attitude are very important for investing in Bitcoin, because Bitcoin is a long-term asset, the possibility of losing money from short-term Bitcoin investment is high, but the possibility of profiting from long-term holding is very high.
Those who understand the real potential of Bitcoin, and invest regularly in the DCA method, are not affected by the short-term volatility of the market. Because they know very well that Bitcoin will always have short-term fluctuations, but long-term holding is where the real success of Bitcoin is achieved, and if an investor continues DCA regularly for the next 2 to 3 cycles, he will definitely be able to achieve success.