The way volatility is going in the crypto market you can say buy and hold is a good option. But their are something to understand that don't buy at high because and what are you going to hold it have proper research it. Because if you buy shit and hold it you can loose everything and also if you buy at high still your capital stuck. So always take entry in dip.
You shouldn't buy low-rated riptocurrencies for long-term storage. It is best to invest in the top rated cryptocurrencies and after a while it will bring you a really very good profit. But in order to feel more comfortable, you need to have other sources of income, so that investment in cryptocurrency does not put much pressure on you and does not cause panic during a fall or strong fluctuation in the cryptocurrency market.