These people are aiming for short-term profits, usually in fiat currency.
Best advice is that you aim for long-term, and stop checking the price every day.
It might be a useful tactic for altcoins and tokens supporters, but for bitcoin seriously Best advice is that you aim for long-term, and stop checking the price every day.
Bitcoin will never disappear till the Internet is working.
Long-term holding is good but the best option is to sell whenever it is high and buy with your profit whenever it is low.