It's not the first time I've seen a longterm holding address, nor is it the largest. It really takes a lot of courage to hold onto Bitcoin for a long time, and for those who've been around since the beginning, they're the true Bitcoin believers. Many people feel tempted to sell their Bitcoins when the price suddenly drops. That's why it's important for longterm holders to check the market less often. This helps prevent fear and the panic that often leads investors to sell in the short term.
The problem with people investing bitcoin is the mindset of getting quick profit and not understanding the volatility of the market. If people have mindset of making profit in bitcoin fast it will be difficult for them hodl bitcoin because their interest is just to make profit quick, and with this mindset of making profit so quick volatility will be a big threat to investors like this because when the price of bitcoin drops they would think they are losing all they have invested because their target and expectations have always to earn profit.
Investors needs to understand the volatility in bitcoin very well not to panic when a dip occurs, when the market goes down it doesn't mean it is a lose. It can only be a lose when one sells out of fear of lose, the dip is just for a moment which will not remain forever. We need to learn how to make good decisions in hodling.