They save bitcoin for a long time because they know that the Bicoin price will go not double, triple but 4-5x it's price of today. Just like 5 years ago many people ignore bitcoins just look what's the value of it today many people invest bitcoin past years ago and look at them now, they're now rich because they wait for the right time. The benefit of saving for a long time is the longer you hold your bitcoin the more richer you're going to be in the future.
Well let's have that history can repeat otself, it may took too long now before it increase again into 4-5x of its value now since some countries were banning it that gives too much affect on decreasing of btc.
Not some countries, only China is taking this foolish step of banning bitcoins and I dont think so this is going to harm bitcoins and their popularity in anyway. You are quite lucky if it is really very easy for you to convert bitcoins into cash and I want more exchanges to be made everywhere in the world for cashing out bitcoins.