I prefer to take a part in long term investment because it is safer indeed.
For example, it will be safer if we buy some big coins like bitcoin, ethereum or bnb than some new altcoins.
But we need patience to hold because usually big coins price are already high, maybe few years later they will make a new ATH.
I think the way you buy very popular coins or major coins like Bitcoin and Ethereum is very suitable for long-term investment because these two coins have a very high demand and of course will provide a lot of profit when you can implement long-term investments, you just need to find the right moment to buy this coin so that when the price goes up it will give you a lot of profit.