Before I do the holding of that coin, I always check first its background and how many people support this kind of coin. This thing would matter for you to be able to know if there is a chance that this coin would pump or will dump its price soon. Some of the coins dumps its price so fast that is why you need to sell it before this thing might happen.
Hard to verify all these numbers though, coin holders for these small projects tend to be few. And even if in the hundreds, the majority of the supply will be in the hands of a few miners and founders (or stakers if it's POS).
I mean, even if the Telegram group's got 10k or 50k, it's 99% bounty hunters anyway or people hoping to get some tiny amounts of rain for chatting.