We have seen this many times before and we will see more of this going forward, old Bitcoin wallets will keep on transacting because you don't expect them to leave their Bitcoin dormant forever, as most people who hold Bitcoin way back have a long-term goal to it some may place 10 years holding plans other can also have 20-year holding plans to at whateverr time the owner feels comfortable to move their Bitcoin around it's the choice and their money and it is sure ther made huge profits already considering the entry time and price.
5,000 bitcoins is not that huge to create any panic or discussion here, 1.5 million Bitcoin are traded daily and that is enough volume to accommodate any old wallet balance whenever their get offloaded into the market. I don't panic when I see such old. wallet balance movement only newbies do that and as for old members who are already experienced with such actions, I can only get excited that at least the dormant long abandon wallet is still active and that gives us the chance to take hold of then if the wallet owner injects those Bitcoin into the market, but at the moment we can't confirm if the Bitcoin we're transferred to an exchange wallet or a privately own cold wallet.
I agree that it is not really a big deal to see these wallets moving, and people who are overreacting to these are the same people who sell their coins anytime there is a bad news. I would say that do not make any moves or trades based on what you have seen in the market, that doesn't make sense to me, if you are going to make any changes then you should make those changes based on what the fundamentals show and not what the daily news or media is putting out. Wallets move all the time, it is a common thing, even 5000 btc moving is common these days if you look at the big wall street companies like microstrategy, that is why we shouldn't be really shocked about it at all.