See my suggestions for you to hold with zero worries;

• Buy and Hold with money you wouldn't need in a short term: If you want to hold with zero worries, ensure you buy with somewhat a spare money. Don't use money for your house rent in few months to hold. It will make you panic if the market crashes few weeks to your rent expiration
• Do not buy in a bull market: Timing is of essence for long term holders. A day trader can enter a market at ATH, hoping to exit the market any moment he makes profits. But a long time hodler who bought bitcoin at $60k cannot leave without worries till whenever btc will touch ATH again.
• Be mindful of the coin you buy for long term purpose: Avoid coins which do not have real time utility values. Apart from bitcoin which has proven to be outstanding, atleast in fee years from now coin like Ethereum, bnb will still be in existence because they have utility value. Try as much as you can to avoid meme coins for long term investment.