Misconceptions I think many people are having is that holding is the only thing to do once you've invested into something. But that's absolutely wrong. The market price is not continuously and consistently increasing over time. Market analysis is needed in order for an investor or user to make decisions whether to invest or sell at a certain point because that would generate income not holding alone. Profit from holding for years won't be as big as profit from selling at certain price points, "bullish market" times to be specific. The will be losses to some cryptos because not all cryptos are having price increase especially the small ones in this industry.
May be that is true. But I am someone who regret the fact that I sold most of my coins when the prices were low. In theory, it is always profitable to sell at spikes and buy at dips. But in reality this is never practical, as we never know what will be the peak price and when the coin will bottom out. Anyway, I have learnt my lesson and I am keeping most of my remaining coins for the long term.