But I think holding it for 5–10 years will actually be profitable.
Yes this is long term saving and it will help because bitcoin would have increased more in 5 to 10 years. But it would be good if the coins (I mean bitcoin) can be saved or hold throughout someone's entirely life and let his children still inherit it because bitcoin is an asset of value, its price will continue to increase undoubtedly.
It is true that if Bitcoin can be held for a period of ten years, it will provide high returns. Because we can see that the price of Bitcoin is constantly increasing and its demand is also continuously increasing, in that case Bitcoin will reach a better position in the future. And if a person holds Bitcoin for the rest of his life, then he must leave it for his future generations. If you invest in Bitcoin now and leave it for the future for your children, then they will get more profit from it.