There is no certainty that long-term investment will be successful. But compared to short-term investment, the risk in long-term investment is much less. In the case of long-term investment, you do not need to worry about small declines. Remember one thing, Bitcoin is very volatile. If the market dumps, it will pump, or if the market rises, it will dump. This can be for a short time or for a long time. So you do not have to worry much about long-term investment. Because you will invest, keep your investment period for 2 to 3 circles.
It is true that you can never be guaranteed with your investment. In the case of long-term investment, the risk is low and the chances of success in the investment are high, but it is not guaranteed. When you are planning for the long term, you do not need to worry about the volatility of the market. Because volatility is normal in the Bitcoin market. In a volatile market, the price always moves and the market sometimes looks green or sometimes looks red. But if you are a long-term investor, the market is most likely to be green for you. Because the price in 8-12 years will be much higher than today's price, which is why you will see green candles in every cycle.
But if you look at the short-term candles, you will see red sometimes and green sometimes. Never panic and sell Bitcoin when you see red candles, because red candles are temporary which eventually turn green. Learn to use both red and green candles correctly and keep buying both.