That's a good tip though everyone has a point and a reason why we're DCAing. And one way to monitor or at least get more encouragement is through checking the price regularly. When it is not advisable to check the prices regularly is if we are at the bear market when you're just mostly on hold position and don't accumulate, so it pretty much don't have difference at all.
Monitoring and cheeking the price of Bitcoin regularly is a traders mindset since if you are investing for a long time purpose three is no need trying to cheek the price of Bitcoin regularly before accumulating Bitcoin and also for investors using the DCA strategy you won't have much need cheeking price of Bitcoin when you can accumulate Bitcoin either weekly or monthly regardless of it's price and continue hodling for long when the price is also at dip it will give you the opportunity to accumulate more Bitcoin.
Imagine the stress you can get for continuous checking of the price, that's why I don't really recommend this to be done by people especially if they are serious to deal with their long term investment. Negative sentiments and bad market movement could potentially affect their decision making.
So to avoid committing mistake that they might regret later on much better if they pay attention on their accumulating and proper budgeting than doing unnecessary price checking. There are lot of things to happen on the market and we should never let our focus get destroyed by unwanted matters. If there's a chance that we can accumulate at the dip then its good but it will be more fine to us if we stick to our plan and accumulate whatever bitcoin price show up.