If you are looking into the market once or twice a week, you may see where the ship sails, and thus choose your entry and exit points (mostly, the latter). Indeed, if you make a couple trades a week, this won't make you into a day trader (though opinions may vary), but that still makes you a trader, not a 100% holder
Technically, it is exactly the idea behind "hodling", i.e. to forget about your cryptocurrency investments for a few years (the longer the better). You can see such advices springing up here and here of the forum, especially when someone was unlucky to buy at or near the top. To sum it up, a hodler is essentially a failed trader
Just because you do checking the price constantly once a week or so , doesn't mean you'll set your buy or sell position.
You could be just curious whether are you there yet reaching your investment target
So you expect to reach your investment target in a week or so, right?
Well, I actually don't mean that you should sell or buy every time you look at the charts, but it still seems to me a bit counterintuitive to check prices now and then if you intend to keep your coins for years. If you do, then seeing the price crash may make you nervous and anxious about the future of your investments up to a point where your faith gives in suddenly, and you sell at a loss. This is a real-life scenario with the implication being that you'd better not check the prices "just out of curiosity" or "for fun"