there are block explorers that do exactly that what you describe. most of them are altcoin related but it can be done for bitcoin too.
Could you please post a link to one of them that does exactly what I need (actually, two, for bitcoin and dogecoin)?
See you added a link, now testing. It seems there are neither btc nor doge there...
look at bitinfocharts.com/bitcoin and bitinfocharts.com/dogecoin this might be something you are looking for.
Okay, these links seem to be valid, checked doges, in which I'm even more interested than in bitcoins right now... Thanks a lot!
if i were you i would follow where the coins are distributed, its easy and very fast to keep track of it. you would know if the person had many btc address on his name or only one. or when small payments are made, probably he is selling coins
I don't quite understand what you mean. How can I keep track where the coins are distributed?