Many of us are hoarding more Bitcoins over time. That is also the reason why Bitcoin dropped sharply on exchanges
transactions in the past few years.
Will we sell out of Bitcoin one day? Like how the ring was thrown into volcanic lava.

It's actually a good move to hold BTC knowing it would be big in the future but there's nothing wrong about taking profit sometimes especially if you're an experienced trader. You could sell your BTC at a high price and buyback when the price of BTC dips and do the same thing until the number of your BTC increases