Holding (or HODLing) refers to keeping Bitcoin for a certain period of time waiting until the price of Bitcoin increases and the holder can make a reasonable profit from it. Holding can last for a year, four years, ten years or even longer, depending on how much the price of Bitcoin rises to the point where the investor is satisfied with the profit and sell to take the profits.the reason why many people prefer to hold for a long term like 4 to 10 years or more is because of the Bitcoin halving. Every four years a Bitcoin halving occurs, and after each halving, there is usually a bullrun a period when the price of Bitcoin moves to a new ATH This is based on Bitcoin history.
There has been cases, where people are either passed away, or in prison, or just forget their access, and either someone else, or them, finally get an access, and they made huge amount. Just recently, some person who had 80k bitcoins from the early satoshi days, cashed it out for 9 billion dollars.
Imagine the thrill of that, no idea if he was in prison or if that money was stolen, no idea how he waited this long, I mean you say no to 1 million, sure, weird, but ok, then you say no to 10 million, weird, you are crazy, you say no to 100 million??? You are certifiably insane. This dude said no to 1 billon! dollars and waited until 9. How can you even do that, I always like to assume because they couldn't sell, not because they didn't, otherwise it's hard to believe it.